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LeetCode Solution In Hard Way

(Notes: "🔒" means you need to buy a book from Leetcode)

# Title Solution Difficulty
剑�� Offer II 092 将字符串翻转到单调递增 C++ Medium
剑指 Offer II 091 粉刷房子 C++ Medium
剑指 Offer II 090 打家劫舍 II C++ Medium
剑指 Offer II 089 打家劫舍 C++ Medium
剑指 Offer II 088 使用最小花费爬楼梯 C++ Easy
剑指 Offer II 087 复原 IP 地址 C++ Medium
剑指 Offer II 086 分割回文串 C++ Medium
剑指 Offer II 085 括号生成 C++ Medium
剑指 Offer II 084 全排列 II C++ Medium
剑指 Offer II 083 全排列 C++ Medium
剑指 Offer II 082 组合总和 II C++ Medium
剑指 Offer II 081 组合总和 C++ Medium
剑指 Offer II 080 组合 C++ Medium
剑指 Offer II 079 子集 C++ Medium
剑指 Offer II 078 合并 K 个升序链表 C++ Hard
剑指 Offer II 077 排序链表 C++ Medium
剑指 Offer II 076 数组中的第 K 个最大元素 C++ Medium
剑指 Offer II 075 数组的相对排序 C++ Easy
剑指 Offer II 074 合并区间 C++ Medium
剑指 Offer II 073 爱吃香蕉的狒狒 C++ Medium
剑指 Offer II 072 x 的平方根 C++ Easy
剑指 Offer II 071 按权重随机选择 C++ Medium
剑指 Offer II 070 有序数组中的单一元素 C++ Medium
剑指 Offer II 069 山脉数组的峰顶索引 C++ Easy
剑指 Offer II 068 搜索插入位置 C++ Easy
剑指 Offer II 067 数组中两个数的最大异或值 C++ Medium
剑指 Offer II 066 键值映射 C++ Medium
剑指 Offer II 065 单词的压缩编码 C++ Medium
剑指 Offer II 064 实现一个魔法字典 C++ Medium
剑指 Offer II 063 替换单词 C++ Medium
剑指 Offer II 062 实现前缀��� C++ Medium
剑指 Offer II 061 和最小的 k 个数对 C++ Medium
剑指 Offer II 060 出现频率最高的 k 个数字 C++ Medium
剑指 Offer II 059 数据流的第 K 大数值 C++ Easy
剑指 Offer II 058 日程表 C++ Medium
剑指 Offer II 057 值和下标之差都在给定的范围内 C++ Medium
剑指 Offer II 056 二叉搜索树中两个节点之和 C++ Easy
剑指 Offer II 055 二叉搜索树迭代器 C++ Medium
剑指 Offer II 054 所有大于等于节点的值之和 C++ Medium
剑指 Offer II 053 二叉搜索树中的中序后继 C++ Medium
剑指 Offer II 052 展平二叉搜索树 C++ Easy
剑指 Offer II 051 节点之和最大的路径 C++ Hard
剑指 Offer II 050 向下的路径节点之和 C++ Medium
剑指 Offer II 049 从根节点到叶节点的路径数字之和 C++ Medium
剑指 Offer II 048 序列化与反序列化二叉树 C++ Hard
剑指 Offer II 047 二叉树剪枝 C++ Medium
剑指 Offer II 046 二叉树的右侧视图 C++ Medium
剑指 Offer II 045 二叉树最底层最左边的值 C++ Medium
剑指 Offer II 043 往完全二叉树添加节点 C++ Medium
剑指 Offer II 042 最近请求次数 C++ Easy
剑指 Offer II 041 滑动窗口的平均值 C++ Easy
剑指 Offer II 040 矩阵中最大的矩形 C++ Hard
剑指 Offer II 039 直方图最大矩形面积 C++ Hard
剑指 Offer II 038 每日温度 C++ Medium
剑指 Offer II 037 小行星碰撞 C++ Medium
剑指 Offer II 036 后缀表达式 C++ Medium
剑指 Offer II 035 最小时间差 C++ Medium
剑指 Offer II 034 外星语言是否排序 C++ Medium
剑指 Offer II 033 变位词组 C++ Medium
剑指 Offer II 032 有效的变位词 C++ Easy
剑指 Offer II 031 最近最少使用缓存 C++ Medium
剑指 Offer II 030 插入、删除和随机访问都是 O(1) 的容器 C++ Medium
剑指 Offer II 029 排序的循环链表 C++ Medium
剑指 Offer II 028 展平多级双向链表 C++ Medium
剑指 Offer II 027 回文链表 C++ Easy
剑指 Offer II 025 链表中的两数相加 C++ Medium
剑指 Offer II 022 链表中环的入口节点 C++ Medium
剑指 Offer II 021 删除链表的倒数第 n 个结点 C++ Medium
剑指 Offer II 020 回文子字符串的个数 C++ Medium
剑指 Offer II 019 最多删除一个字符得到回文 C++ Easy
剑指 Offer II 018 有效的回文 C++ Easy
剑指 Offer II 017 含有所有字符的最短字符串 C++ Hard
剑指 Offer II 016 不含重复字符的最长子字符串 C++ Medium
剑指 Offer II 015 字符串中的所有变位词 C++ Medium
剑指 Offer II 014 字符串中的变位词 C++ Medium
剑指 Offer II 012 左右两边子数组的和相等 C++ Medium
剑指 Offer II 011 0 和 1 个数相同的子数组 C++ Medium
剑指 Offer II 010 和为 k 的子数组 C++ Medium
剑指 Offer II 009 乘积小于 K 的子数组 C++ Medium
剑指 Offer II 008 和大于等于 target 的最短子数组 C++ Medium
剑指 Offer II 007 数组中和为 0 的三个数 C++ Medium
剑指 Offer II 006 排序数组中两个数字之和 C++ Medium
剑指 Offer II 005 单词长度的最大乘积 C++ Medium
剑指 Offer II 004 只出现一次的数字 C++ Easy
剑指 Offer II 003 前 n 个数字二进制中 1 的个数 C++ Easy
剑指 Offer II 002 二进制加法 C++ Easy
剑指 Offer II 001 整数除法 C++ Easy
剑指 Offer 66 构建乘积数组 C++ Medium
剑指 Offer 65 不用加减乘除做加法 C++ Easy
剑指 Offer 60 n个骰子的点数 C++ Medium
剑指 Offer 57 I. 翻转单词顺序 C++ Easy
剑指 Offer 57 II. 和为s的连续正数序列 C++ Easy
剑指 Offer 57 和为s的两个数字 C++ Easy
剑指 Offer 56 II. 数组中数字出现的次数 II C++ Medium
剑指 Offer 56 I. 数组中数字出现的次数 C++ Medium
剑指 Offer 55 II. 平衡二叉树 C++ Easy
剑指 Offer 55 I. 二叉树的深度 C++ Easy
剑指 Offer 54 二叉搜索树的第k大节点 C++ Easy
剑指 Offer 53 II. 0～n-1中缺失的数字 C++ Easy
剑指 Offer 53 I. 在排序数组中查找数字 I C++ Easy
剑指 Offer 52 两个链表的第一个公共节点 C++ Easy
剑指 Offer 51 数组中的逆序对 C++ Hard
剑指 Offer 50 第一个只出现一次的字符 C++ Easy
剑指 Offer 49 丑数 C++ Medium
剑指 Offer 48 最长不含重复字符的子字符串 C++ Medium
剑指 Offer 47 礼物的最大价值 C++ Medium
剑指 Offer 46 把数字翻译成字符串 C++ Medium
剑指 Offer 45 把数组排成最小的数 C++ Medium
剑指 Offer 44 数字序列中某一位的数字 C++ Medium
剑指 Offer 43 1～n 整数中 1 出现的次数 C++ Hard
剑指 Offer 42 连续子数组的最大和 C++ Easy
剑指 Offer 41 数据流中的中位数 C++ Hard
剑指 Offer 40 最小的k个数 LCOF C++ Easy
剑指 Offer 39 数组中出现次数超过一半的数字 C++ Easy
剑指 Offer 38 字符串的排列 C++ Medium
剑指 Offer 36 二叉搜索树与双向链表 C++ Medium
剑指 Offer 34 二叉树中和为某一值的路径 C++ Medium
剑指 Offer 06 从尾到头打印链表 C++ Easy
剑指 Offer 05 替换空格 C++ Easy
剑指 Offer 04 二维数组中的查找 C++ Medium
剑指 Offer 03 数组中重复的数字 C++ Easy
bytedance-006 夏季特惠 C++ Easy
LCR 132 砍竹子 II C++ Medium
LCR 119 最长连续序列 C++ Medium
LCR 118 冗余连接 C++ Medium
LCR 117 相似字符串组 C++ Hard
LCR 116 省份数量 C++ Medium
LCR 115 序列重建 C++ Medium
LCR 114 火星词典 C++ Hard
LCR 113 课程表 II C++ Medium
LCR 112 矩阵中的最长递增路径 C++ Hard
LCR 111 除法求值 C++ Medium
LCR 110 所有可能的路径 C++ Medium
LCR 109 打开转盘锁 C++ Medium
LCR 108 单词接龙 C++ Hard
LCR 107 01 矩阵 C++ Medium
LCR 106 判断二分图 C++ Medium
LCR 105 岛屿的最大面积 C++ Medium
LCR 104 组合总和 Ⅳ C++ Medium
LCR 103 零钱兑换 C++ Medium
LCR 102 目标和 C++ Medium
LCR 101 分割等和子集 C++ Easy
LCR 100 三角形最小路径和 C++ Medium
LCR 099 最小路径和 C++ Medium
LCR 098 不同路径 C++ Medium
LCR 097 不同的子序列 C++ Hard
LCR 096 交错字符串 C++ Medium
LCR 095 最长公共子序列 C++ Medium
LCR 094 分割回文串 II C++ Hard
LCR 093 最长的斐波那契子序列的长度 C++ Medium
LCP 74 最强祝福力场 C++ Medium
LCP 61 气温变化趋势 C++ Easy
LCP 41 黑白翻转棋 C++ Medium
LCP 35 电动车游城市 C++ Hard
LCP 30 魔塔游戏 C++ Medium
LCP 10 二叉树任务调度 C++ Hard
LCP 09 最小跳跃次数 C++ Hard
LCP 08 剧情触发时间 C++ Medium
LCP 07 传递信息 C++ Easy
LCP 06 拿硬币 C++ Easy
LCP 04 Broken Board Dominoes C++ Hard
LCP 03 Programmable Robot C++ Medium
LCP 02 Deep Dark Fraction C++ Easy
LCP 01 Guess Numbers C++ Easy
17.25 Word Rectangle LCCI C++ Hard
17.24 Max Submatrix LCCI C++ Hard
17.23 Max Black Square LCCI C++ Medium
17.22 Word Transformer LCCI C++ Medium
17.21 Volume of Histogram LCCI C++ Hard
17.20 Continuous Median LCCI C++ Hard
17.19 Missing Two LCCI C++ Hard
17.18 Shortest Supersequence LCCI C++ Medium
17.16 The Masseuse LCCI C++ Easy
17.15 Longest Word LCCI C++ Medium
17.14 Smallest K LCCI C++ Medium
17.13 Re-Space LCCI C++ Medium
17.12 BiNode C++ Easy
17.11 Find Closest LCCI C++ Medium
17.10 Find Majority Element LCCI C++ Easy
17.09 Get Kth Magic Number LCCI C++ Medium
17.08 Circus Tower LCCI C++ Medium
17.07 Baby Names LCCI C++ Medium
17.06 Number Of 2s In Range LCCI C++ Hard
17.05 Find Longest Subarray LCCI C++ Medium
17.04 Missing Number LCCI C++ Easy
17.01 Add Without Plus LCCI C++ Easy
16.26 Calculator LCCI C++ Medium
16.25 LRU Cache LCCI C++ Medium
16.24 Pairs With Sum LCCI C++ Medium
16.22 Langtons Ant LCCI C++ Medium
16.21 Sum Swap LCCI C++ Medium
16.20 T9 LCCI C++ Medium
16.19 Pond Sizes LCCI C++ Medium
16.18 Pattern Matching LCCI C++ Medium
16.17 Contiguous Sequence LCCI C++ Easy
16.16 Sub Sort LCCI C++ Medium
16.15 Master Mind LCCI C++ Easy
16.14 Best Line LCCI C++ Medium
16.13 Bisect Squares LCCI C++ Medium
16.11 Diving Board LCCI C++ Easy
16.10 Living People LCCI C++ Medium
16.09 Operations LCCI C++ Medium
16.08 English Int LCCI C++ Hard
16.07 Maximum LCCI C++ Medium
16.06 Smallest Difference LCCI C++ Medium
16.05 Factorial Zeros LCCI C++ Easy
16.04 Tic-Tac-Toe LCCI C++ Medium
16.03 Intersection LCCI C++ Hard
16.02 Words Frequency LCCI C++ Medium
16.01 Swap Numbers LCCI C++ Medium
10.11 Peaks and Valleys LCCI C++ Medium
10.10 Rank from Stream LCCI C++ Medium
10.09 Sorted Matrix Search LCCI C++ Medium
10.04 Sparse Array Search LCCI C++ Easy
10.03 Search Rotate Array LCCI C++ Medium
10.02 Group Anagrams LCCI C++ Medium
10.01 Sorted Merge LCCI C++ Easy
08.14 Boolean Evaluation LCCI C++ Medium
08.13 Pile Box LCCI C++ Hard
08.12 Eight Queens LCCI C++ Hard
08.11 Coin LCCI C++ Medium
08.10 Color Fill LCCI C++ Easy
08.09 Bracket LCCI C++ Medium
08.08 Permutation II LCCI C++ Medium
08.07 Permutation I LCCI C++ Medium
08.06 Hanota LCCI C++ Medium
08.05 Recursive Mulitply LCCI C++ Medium
08.04 Power Set LCCI C++ Medium
08.03 Magic Index LCCI C++ Easy
08.02 Robot in a Grid LCCI C++ Medium
08.01 Three Steps Problem LCCI C++ Easy
05.08 Draw Line LCCI C++ Medium
05.07 Exchange LCCI C++ Easy
05.06 Convert Integer LCCI C++ Easy
05.04 Closed Number LCCI C++ Medium
05.03 Reverse Bits LCCI C++ Easy
05.02 Binary Number to String LCCI C++ Medium
05.01 Insert Into Bits LCCI C++ Easy
04.12 Paths with Sum LCCI C++ Medium
04.10 Check SubTree LCCI C++ Medium
04.09 BST Sequences LCCI C++ Hard
04.08 First Common Ancestor LCCI C++ Medium
04.06 Successor LCCI C++ Medium
04.05 Legal Binary Search Tree LCCI C++ Medium
02.02 Kth Node From End of List LCCI C++ Easy
02.01 Remove Duplicate Node LCCI C++ Easy
01.09 String Rotation LCCI C++ Easy
01.08 Zero Matrix LCCI C++ Medium
01.02 Check Permutation LCCI C++ Easy
3154 Find Number of Ways to Reach the K-th Stair C++ Medium
3153 Sum of Digit Differences of All Pairs C++ Medium
3152 Special Array II C++ Medium
3151 Special Array I C++ Easy
3148 Maximum Difference Score in a Grid C++ Medium
3145 Maximum Difference Score in a Grid C++ Hard
3144 Minimum Substring Partition of Equal Character Frequency C++ Medium
3142 Check if Grid Satisfies Conditions C++ Easy
3134 Find the Median of the Uniqueness Array C++ Hard
3131 Find the Integer Added to Array I C++ Easy
3117 Minimum Sum of Values by Dividing Array C++ Hard
3115 Maximum Prime Difference C++ Medium
3112 Minimum Time to Visit Disappearing Nodes C++ Medium
3099 Harshad Number C++ Easy
3098 Find the Sum of Subsequence Powers C++ Hard
3007 Maximum Number That Sum of the Prices Is Less Than or Equal to K C++ Medium
2974 Minimum Number Game C++ Easy
2970 Count the Number of Incremovable Subarrays I C++ Easy
2961 Double Modular Exponentiation C++ Medium
2960 Count Tested Devices After Test Operations C++ Easy
2959 Number of Possible Sets of Closing Branches C++ Hard
2951 Find the Peaks C++ Easy
2926 Maximum Balanced Subsequence Sum C++ Hard
2923 Find Champion I C++ Easy
2917 Find the K-or of an Array C++ Easy
2867 Count Valid Paths in a Tree C++ Hard
2864 Maximum Odd Binary Number C++ Easy
2846 Minimum Edge Weight Equilibrium Queries in a Tree C++ Hard
2836 Maximize Value of Function in a Ball Passing Game C++ Hard
2834 Find the Minimum Possible Sum of a Beautiful Array C++ Medium
2828 Check if a String Is an Acronym of Words C++ Easy
2824 Count Pairs Whose Sum is Less than Target C++ Easy
2813 Maximum Elegance of a K-Length Subsequence C++ Hard
2810 Faulty Keyboard C++ Easy
2806 Account Balance After Rounded Purchase C++ Easy
2789 Largest Element in an Array after Merge C++ Hard
2786 Visit Array Positions to Maximize Score C++ Medium
2769 Find the Maximum Achievable Number C++ Easy
2766 Relocate Marbles C++ Medium
2765 Longest Alternating Subarray C++ Easy
2748 Number of Beautiful Pairs C++ Easy
2742 Painting the Walls C++ Hard
2734 Lexicographically Smallest String After Substring Operation C++ Medium
2719 Count of Integers C++ Hard
2713 Maximum Strictly Increasing Cells in a Matrix C++ Hard
2698 Find the Punishment Number of an Integer C++ Medium
2681 Power of Heroes C++ Hard
2679 Sum in a Matrix C++ Medium
2674 Frequency Tracker C++ Medium
2673 Make Costs of Paths Equal in a Binary Tree C++ Medium
2661 First Completely Painted Row or Column C++ Medium
2651 Calculate Delayed Arrival Time C++ Easy
2646 Minimize the Total Price of the Trips C++ Hard
2641 Cousins in Binary Tree II C++ Medium
2639 Find the Width of Columns of a Grid C++ Easy
2611 Mice and Cheese C++ Medium
2609 Find the Longest Balanced Substring of a Binary String C++ Easy
2605 Form Smallest Number From Two Digit Arrays C++ Easy
2603 Collect Coins in a Tree C++ Hard
2600 K Items With the Maximum Sum C++ Easy
2596 Check Knight Tour Configuration C++ Medium
2591 Distribute Money to Maximum Children C++ Easy
2594 Minimum Time to Repair Cars C++ Medium
2586 Count the Number of Vowel Strings in Range C++ Easy
2583 Kth Largest Sum in a Binary Tree C++ Medium
2578 Split With Minimum Sum C++ Easy
2575 Find the Divisibility Array of a String C++ Medium
2569 Handling Sum Queries After Update C++ Hard
2562 Find the Array Concatenation Value C++ Easy
2560 House Robber IV C++ Medium
2559 Count Vowel Strings in Ranges C++ Medium
2551 Put Marbles in Bags C++ Hard
2544 Alternating Digit Sum C++ Easy
2532 Time to Cross a Bridge C++ Hard
2530 Maximal Score After Applying K Operations C++ Medium
2529 Maximum Count of Positive Integer and Negative Integer C++ Easy
2520 Count the Digits That Divide a Number C++ Easy
2517 Maximum Tastiness of Candy Basket C++ Medium
2512 Reward Top K Students C++ Medium
2500 Delete Greatest Value in Each Row C++ Easy
2496 Maximum Value of a String in an Array C++ Easy
2490 Circular Sentence C++ Easy
2485 Find the Pivot Integer C++ Easy
2481 Minimum Cuts to Divide a Circle C++ Easy
2477 Minimum Fuel Cost to Report to the Capital C++ Medium
2476 Closest Nodes Queries in a Binary Search Tree C++ Medium
2475 Number of Unequal Triplets in Array C++ Easy
2472 Maximum Number of Non-overlapping Palindrome Substrings C++ Hard
2465 Number of Distinct Averages C++ Easy
2463 Minimum Total Distance Traveled C++ Hard
2460 Apply Operations to an Array C++ Easy
2458 Height of Binary Tree After Subtree Removal Queries C++ Hard
2455 Average Value of Even Numbers That Are Divisible by Three C++ Easy
2451 Odd String Difference C++ Easy
2449 Minimum Number of Operations to Make Arrays Similar C++ Hard
2437 Number of Valid Clock Times C++ Easy
2435 Paths in Matrix Whose Sum Is Divisible by K C++ Hard
2421 Number of Good Paths C++ Hard
2418 Sort the People C++ Easy
2409 Count Days Spent Together C++ Easy
2404 Most Frequent Even Element C++ Easy
2384 Largest Palindromic Number C++ Medium
2373 Largest Local Values in a Matrix C++ Easy
2370 Longest Ideal Subsequence C++ Medium
2369 Check if There is a Valid Partition For The Array C++ Medium
2367 Count Special Integers C++ Hard
2363 Merge Similar Items C++ Easy
2352 Equal Row and Column Pairs C++ Medium
2341 Maximum Number of Pairs in Array C++ Easy
2336 Smallest Number in Infinite Set C++ Medium
2331 Evaluate Boolean Binary Tree C++ Easy
2325 Decode the Message C++ Easy
2322 Minimum Score After Removals on a Tree C++ Hard
2319 Check if Matrix Is X-Matrix C++ Easy
2312 Selling Pieces of Wood C++ Hard
2304 Minimum Path Cost in a Grid C++ Medium
2300 Successful Pairs of Spells and Potions C++ Medium
2288 Apply Discount to Prices C++ Medium
2281 Sum of Total Strength of Wizards C++ Hard
2258 Number of Flowers in Full Bloom C++ Hard
2251 Number of Flowers in Full Bloom C++ Hard
2246 Longest Path With Different Adjacent Characters C++ Hard
2244 Minimum Rounds to Complete All Tasks C++ Medium
2240 Number of Ways to Buy Pens and Pencils C++ Medium
2218 Maximum Value of K Coins From Piles C++ Hard
2209 Minimum Obstacle Removal to Reach Corner C++ Hard
2208 Minimum Operations to Halve Array Sum C++ Medium
2193 Minimum Number of Moves to Make Palindrome C++ Hard
2180 Count Integers With Even Digit Sum C++ Easy
2178 Maximum Split of Positive Even Integers C++ Medium
2168 Unique Substrings With Equal Digit Frequency C++ Medium
2166 Design Bitset C++ Medium
2141 Maximum Running Time of N Computers C++ Hard
2136 Earliest Possible Day of Full Bloom C++ Medium
2132 Stamping the Grid C++ Hard
2129 Capitalize the Title C++ Easy
2127 Maximum Employees to Be Invited to a Meeting C++ Hard
2111 Minimum Operations to Make the Array K-Increasing C++ Hard
2106 Maximum Fruits Harvested After at Most K Steps C++ Hard
2105 Watering Plants II C++ Medium
2092 Find All People With Secret C++ Hard
2079 Watering Plants C++ Medium
2071 Maximum Number of Tasks You Can Assign C++ Hard
2065 Maximum Path Quality of a Graph C++ Hard
2050 Parallel Courses III C++ Hard
2042 Check if Numbers Are Ascending in a Sentence C++ Easy
2034 Stock Price Fluctuation C++ Medium
2011 Final Value of Variable After Performing Operations C++ Easy
2009 Minimum Number of Operations to Make Array Continuous C++ Hard
2008 Maximum Earnings From Taxi C++ Medium
2007 Find Original Array From Doubled Array C++ Medium
1994 The Number of Good Subsets C++ Hard
1979 Find Greatest Common Divisor of Array C++ Easy
1971 Find if Path Exists in Graph C++ Easy
1945 Sum of Digits of String After Convert C++ Easy
1931 Painting a Grid With Three Different Colors C++ Hard
1921 Eliminate Maximum Number of Monsters C++ Medium
1911 Maximum Alternating Subsequence Sum C++ Medium
1910 Remove All Occurrences of a Substring C++ Medium
1851 Minimum Interval to Include Each Query C++ Hard
1832 Check if the Sentence Is Pangram C++ Easy
1827 Minimum Operations to Make the Array Increasing C++ Easy
1822 Sign of the Product of an Array C++ Easy
1812 Determine Color of a Chessboard Square C++ Easy
1802 Maximum Value at a Given Index in a Bounded Array C++ Medium
1805 Number of Different Integers in a String C++ Easy
1799 Maximize Score After N Operations C++ Hard
1798 Maximum Number of Consecutive Values You Can Make C++ Medium
1797 Design Authentication Manager C++ Medium
1796 Second Largest Digit in a String C++ Easy
1793 Maximum Score of a Good Subarray C++ Hard
1792 Maximum Average Pass Ratio C++ Medium
1790 Check if One String Swap Can Make Strings Equal C++ Easy
1785 Minimum Elements to Add to Form a Given Sum C++ Medium
1784 Check if Binary String Has at Most One Segment of Ones C++ Easy
1781 Sum of Beauty of All Substrings C++ Medium
1780 Check if Number is a Sum of Powers of Three C++ Medium
1779 Find Nearest Point That Has the Same X or Y Coordinate C++ Easy
1775 Equal Sum Arrays With Minimum Number of Operations C++ Medium
1774 Closest Dessert Cost C++ Medium
1773 Count Items Matching a Rule C++ Easy
1769 Minimum Number of Operations to Move All Balls to Each Box C++ Medium
1768 Merge Strings Alternately C++ Easy
1764 Form Array by Concatenating Subarrays of Another Array C++ Medium
1762 Tuple with Same Product C++ Medium
1761 Minimum Degree of a Connected Trio in a Graph C++ Hard
1760 Minimum Limit of Balls in a Bag C++ Medium
1758 Minimum Changes To Make Alternating Binary String C++ Easy
1755 Closest Subsequence Sum C++ Hard
1753 Maximum Score From Removing Stones C++ Medium
1752 Check if Array Is Sorted and Rotated C++ Easy
1751 Maximum Number of Events That Can Be Attended II C++ Hard
1749 Maximum Absolute Sum of Any Subarray C++ Medium
1742 Maximum Number of Balls in a Box C++ Easy
1732 Find the Highest Altitude C++ Easy
1710 Maximum Units on a Truck C++ Easy
1704 Determine if String Halves Are Alike C++ Easy
1703 Minimum Adjacent Swaps for K Consecutive Ones C++ Hard
1702 Maximum Binary String After Change C++ Medium
1700 Number of Students Unable to Eat Lunch C++ Easy
1697 Checking Existence of Edge Length Limited Paths C++ Hard
1696 Jump Game VI C++ Medium
1694 Reformat Phone Number C++ Easy
1690 Stone Game VII C++ Medium
1687 Delivering Boxes from Storage to Ports C++ Hard
1686 Stone Game VI C++ Medium
1684 Count the Number of Consistent Strings C++ Easy
1678 Goal Parser Interpretation C++ Easy
1675 Minimize Deviation in Array C++ Easy
1669 Merge In Between Linked Lists C++ Medium
1668 Maximum Repeating Substring C++ Easy
1662 Check If Two String Arrays are Equivalent C++ Easy
1659 Maximize Grid Happiness C++ Hard
1657 Determine if Two Strings Are Close C++ Medium
1656 Design an Ordered Stream C++ Easy
1655 Distribute Repeating Integers C++ Hard
1654 Minimum Jumps to Reach Home C++ Medium
1652 Defuse the Bomb C++ Easy
1641 Count Sorted Vowel Strings C++ Medium
1638 Count Substrings That Differ by One Character C++ Medium
1637 Widest Vertical Area Between Two Points Containing No Points C++ Medium
1636 Sort Array by Increasing Frequency C++ Easy
1631 Path With Minimum Effort C++ Medium
1630 Arithmetic Subarrays C++ Medium
1624 Largest Substring Between Two Equal Characters C++ Easy
1620 Coordinate With Maximum Network Quality C++ Medium
1619 Mean of Array After Removing Some Elements C++ Easy
1615 Maximal Network Rank C++ Medium
1604 Alert Using Same Key-Card Three or More Times in a One Hour Period C++ Medium
1595 Minimum Cost to Connect Two Groups of Points C++ Hard
1592 Rearrange Spaces Between Words C++ Easy
1590 Make Sum Divisible by P C++ Medium
1582 Special Positions in a Binary Matrix C++ Easy
1574 Shortest Subarray to be Removed to Make Array Sorted C++ Medium
1553 Minimum Number of Days to Eat N Oranges C++ Hard
1552 Magnetic Force Between Two Balls C++ Medium
1547 Minimum Cost to Cut a Stick C++ Hard
1504 Count Submatrices With All Ones C++ Medium
1499 Max Value of Equation C++ Hard
1494 Parallel Courses II C++ Hard
1483 Kth Ancestor of a Tree Node C++ Hard
1475 Final Prices With a Special Discount in a Shop C++ Easy
1473 Paint House III C++ Hard
1470 Shuffle the Array C++ Easy
1466 Reorder Routes to Make All Paths Lead to the City Zero C++ Medium
1465 Maximum Area of a Piece of Cake After Horizontal and Vertical Cuts C++ Message
1464 Maximum Product of Two Elements in an Array C++ Easy
1463 Cherry Pickup II C++ Hard
1462 Course Schedule IV C++ Medium
1460 Make Two Arrays Equal by Reversing Sub-arrays C++ Easy
1455 Check If a Word Occurs As a Prefix of Any Word in a Sentence C++ Easy
1450 Number of Students Doing Homework at a Given Time C++ Easy
1441 Build an Array With Stack Operations C++ Medium
1438 Longest Continuous Subarray With Absolute Diff Less Than or Equal to Limit C++ Medium
1434 Number of Ways to Wear Different Hats to Each Other C++ Hard
1422 Maximum Score After Splitting a String C++ Easy
1417 Reformat The String C++ Easy
1413 Minimum Value to Get Positive Step by Step Sum C++ Easy
1410 HTML Entity Parser C++ Medium
1401 Circle and Rectangle Overlapping C++ Medium
1397 Find All Good Strings C++ Hard
1377 Frog Position After T Seconds C++ Hard
1375 Number of Times Binary String Is Prefix-Aligned C++ Medium
1373 Maximum Sum BST in Binary Tree C++ Hard
1371 Find the Longest Substring Containing Vowels in Even Counts C++ Medium
1368 Minimum Cost to Make at Least One Valid Path in a Grid C++ Hard
1367 Linked List in Binary Tree C++ Medium
1353 Maximum Number of Events That Can Be Attended C++ Medium
1333 Filter Restaurants by Vegan-Friendly, Price and Distance C++ Medium
1329 Sort the Matrix Diagonally C++ Medium
1326 Minimum Number of Taps to Open to Water a Garden C++ Hard
1312 Minimum Insertion Steps to Make a String Palindrome C++ Hard
1302 Deepest Leaves Sum C++ Medium
1282 Group the People Given the Group Size They Belong To C++ Medium
1267 Count Servers that Communicate C++ Medium
1262 Greatest Sum Divisible by Three C++ Medium
1261 Find Elements in a Contaminated Binary Tree C++ Medium
1254 Number of Closed Islands C++ Medium
1253 Reconstruct a 2-Row Binary Matrix C++ Medium
1250 Check If It Is a Good Array C++ Hard
1238 Circular Permutation in Binary Representation C++ Medium
1235 Maximum Profit in Job Scheduling C++ Hard
1234 Replace the Substring for Balanced String C++ Medium
1224 Maximum Equal Frequency C++ Hard
1224 Dice Roll Simulation C++ Hard
1222 Queens That Can Attack the King C++ Medium
1210 Minimum Moves to Reach Target with Rotations C++ Hard
1204 Tiling a Rectangle with the Fewest Squares C++ Hard
1187 Make Array Strictly Increasing C++ Hard
1186 Maximum Subarray Sum with One Deletion C++ Medium
1177 Can Make Palindrome from Substring C++ Medium
1171 Remove Zero Sum Consecutive Nodes from Linked List C++ Medium
1170 Compare Strings by Frequency of the Smallest Character C++ Medium
1167 Minimum Cost To Connect Sticks🔒 C++ Medium
1163 Last Substring in Lexicographical Order C++ Hard
1162 As Far from Land as Possible C++ Medium
1157 Online Majority Element In Subarray C++ Hard
1156 Swap For Longest Repeated Character Substring C++ Medium
1155 Number of Dice Rolls With Target Sum C++ Medium
1153 String Transforms Into Another String🔒 C++ Medium
1147 Longest Chunked Palindrome Decomposition C++ Hard
1146 Snapshot Array C++ Medium
1145 Binary Tree Coloring Game C++ Medium
1143 Longest Common Subsequence C++ Medium
1141 Decrease Elements To Make Array Zigzag C++ Medium
1140 Stone Game II C++ Medium
1139 Largest 1-Bordered Square C++ Medium
1137 N-th Tribonacci Number C++ Easy
1129 Shortest Path with Alternating Colors C++ Medium
1125 Smallest Sufficient Team C++ Hard
1124 Longest Well-Performing Interval C++ Medium
1123 Remove Sub-Folders from the Filesystem C++ Medium
1122 Relative Sort Array C++ Easy
1121 Divide Array Into Increasing Sequences🔒 C++ Medium
1120 Count Vowels Permutation C++ Hard
1109 Corporate Flight Bookings C++ Medium
1106 Parsing A Boolean Expression C++ Hard
1105 Filling Bookcase Shelves C++ Medium
1092 Shortest Common Supersequence C++ Hard
1090 Largest Values From Labels C++ Medium
1080 Insufficient Nodes in Root to Leaf Paths C++ Medium
1072 Flip Columns For Maximum Number of Equal Rows C++ Medium
1067 Digit Count In Range C++ Hard
1061 Lexicographically Smallest Equivalent String C++ Medium
1053 Previous Permutation With One Swap C++ Medium
1049 Last Stone Weight II C++ Medium
1048 Longest String Chain C++ Medium
1043 Partition Array for Maximum Sum C++ Medium
1042 Flower Planting With No Adjacent C++ Medium
1041 Robot Bounded In Circle C++ Medium
1039 Minimum Score Triangulation of Polygon C++ Medium
1038 Binary Search Tree to Greater Sum Tree C++ Medium
1031 Maximum Sum of Two Non-Overlapping Subarrays C++ Medium
1029 Two City Scheduling C++ Medium
1028 Recover a Tree From Preorder Traversal C++ Hard
1026 Maximum Difference Between Node and Ancestor C++ Medium
1023 Camelcase Matching C++ Medium
1019 Next Greater Node In Linked List C++ Medium
1017 Convert to Base -2 C++ Medium
1016 Binary String With Substrings Representing 1 To N C++ Medium
1015 Smallest Integer Divisible by K C++ Medium
1012 Numbers With Repeated Digits C++ Hard
1003 Check If Word Is Valid After Substitutions C++ Medium
1000 Minimum Cost to Merge Stones C++ Hard
0998 Maximum Binary Tree II C++ Medium
0993 Cousins in Binary Tree C++ Easy
0992 Subarrays with K Different Integers C++ Hard
0987 Vertical Order Traversal of a Binary Tree C++ Hard
0983 Minimum Cost For Tickets C++ Medium
0980 Unique Paths III C++ Hard
0979 Distribute Coins in Binary Tree C++ Medium
0975 Odd Even Jump C++ Hard
0970 Powerful Integers C++ Medium
0968 Binary Tree Cameras C++ Hard
0964 Validate Stack Sequences C++ Medium
0962 Maximum Width Ramp C++ Medium
0958 Check Completeness of a Binary Tree C++ Medium
0953 Verifying an Alien Dictionary C++ Easy
0947 Most Stones Removed with Same Row or Column C++ Medium
0940 Distinct Subsequences II C++ Hard
0938 Range Sum of BST C++ Easy
0936 Stamping The Sequence C++ Hard
0934 Shortest Bridge C++ Medium
0933 Number of Recent Calls C++ Easy
0931 Minimum Falling Path Sum C++ Medium
0928 Minimize Malware Spread II C++ Hard
0927 Three Equal Parts C++ Hard
0926 Flip String to Monotone Increasing C++ Medium
0924 Minimize Malware Spread C++ Medium
0922 Sort Array By Parity II C++ Easy
0921 Minimum Add to Make Parentheses Valid C++ Medium
0919 Complete Binary Tree Inserter C++ Medium
0918 Maximum Sum Circular Subarray C++ Medium
0912 Sort an Array C++ Medium
0907 Sum of Subarray Minimums C++ Medium
0906 Super Palindromes C++ Hard
0904 Fruit Into Baskets C++ Medium
0903 Valid Permutations for DI Sequence C++ Hard
0902 Numbers At Most N Given Digit Set C++ Hard
0901 Online Stock Span C++ Medium
0897 Increasing Order Search Tree C++ Easy
0895 Maximum Frequency Stack C++ Hard
0891 Sum of Subsequence Widths C++ Hard
0889 Construct Binary Tree from Preorder and Postorder Traversal C++ Medium
0887 Super Egg Drop C++ Hard
0886 Possible Bipartition C++ Medium
0882 Reachable Nodes In Subdivided Graph C++ Hard
0881 Boats to Save People C++ Medium
0879 Profitable Schemes C++ Hard
0878 Nth Magical Number C++ Hard
0875 Koko Eating Bananas C++ Medium
0874 Walking Robot Simulation C++ Medium
0873 Length of Longest Fibonacci Subsequence C++ Medium
0871 Minimum Number of Refueling Stops C++ Hard
0870 Advantage Shuffle C++ Medium
0864 Shortest Path to Get All Keys C++ Medium
0862 Shortest Subarray with Sum at Least K C++ Hard
0857 Minimum Cost to Hire K Workers C++ Hard
0856 Score of Parentheses C++ Medium
0854 K-Similar Strings C++ Hard
0852 Peak Index in a Mountain Array C++ Medium
0851 Loud and Rich C++ Medium
0850 Rectangle Area II C++ Hard
0839 Similar String Groups C++ Hard
0828 Count Unique Characters of All Substrings of a Given String C++ Hard
0827 Making A Large Island C++ Hard
0823 Binary Trees With Factors C++ Medium
0820 Short Encoding of Words C++ Medium
0817 Linked List Components C++ Medium
0816 Ambiguous Coordinates C++ Medium
0814 Binary Tree Pruning C++ Medium
0813 Largest Sum of Averages C++ Medium
0811 Subdomain Visit Count C++ Medium
0809 Expressive Words C++ Medium
0808 Soup Servings C++ Medium
0805 Split Array With Same Average C++ Hard
0803 Bricks Falling When Hit C++ Hard
0799 Champagne Tower C++ Medium
0797 All Paths From Source to Target C++ Medium
0793 Preimage Size of Factorial Zeroes Function C++ Hard
0792 Number of Matching Subsequences C++ Medium
0791 Custom Sort String C++ Medium
0795 Number of Subarrays with Bounded Maximum C++ Medium
0790 Domino and Tromino Tiling C++ Medium
0788 Rotated Digits C++ Medium
0787 Cheapest Flights Within K Stops C++ Medium
0785 Is Graph Bipartite? C++ Medium
0784 Letter Case Permutation C++ Medium
0781 Rabbits in Forest C++ Medium
0779 K-th Symbol in Grammar C++ Medium
0778 Swim in Rising Water C++ Hard
0777 Swap Adjacent in LR String C++ Medium
0775 Global and Local Inversions C++ Medium
0772 Basic Calculator III🔒 C++ Hard
0765 Couples Holding Hands C++ Hard
0764 Largest Plus Sign C++ Medium
0761 Special Binary String C++ Hard
0754 Reach a Number C++ Medium
0752 Open the Lock C++ Medium
0746 Min Cost Climbing Stairs C++ Easy
0743 Network Delay Time C++ Hard
0741 Cherry Pickup C++ Hard
0739 Daily Temperatures C++ Medium
0735 Asteroid Collision C++ Medium
0730 Count Different Palindromic Subsequences C++ Hard
0729 My Calendar I C++ Medium
0726 Number of Atoms C++ Hard
0724 Find Pivot Index C++ Easy
0722 Remove Comments C++ Medium
0719 Find K-th Smallest Pair Distance C++ Hard
0718 Maximum Length of Repeated Subarray C++ Medium
0714 Best Time to Buy and Sell Stock with Transaction Fee C++ Medium
0711 Jewels and Stones C++ Easy
0708 Insert into a Sorted Circular Linked List C++ Medium
0707 Design Linked List C++ Medium
0706 Design HashMap C++ Easy
0703 Kth Largest Element in a Stream C++ Easy
0699 Falling Squares C++ Hard
0698 Partition to K Equal Sum Subsets C++ Medium
0695 Max Area of Island C++ Medium
0691 Stickers to Spell Word C++ Hard
0690 Employee Importance C++ Medium
0689 Maximum Sum of 3 Non-Overlapping Subarrays C++ Hard
0688 Knight Probability in Chessboard C++ Medium
0687 Longest Univalue Path C++ Medium
0686 Repeated String Match C++ Medium
0684 Redundant Connection C++ Medium
0680 Valid Palindrome II C++ Easy
0677 Map Sum Pairs C++ Medium
0676 Implement Magic Dictionary C++ Medium
0673 Number of Longest Increasing Subsequence C++ Medium
0672 Bulb Switcher II C++ Medium
0670 Maximum Swap C++ Medium
0669 Trim a Binary Search Tree C++ Medium
0664 Strange Printer C++ Hard
0662 Maximum Width of Binary Tree C++ Medium
0658 Find K Closest Elements C++ Medium
0655 Print Binary Tree C++ Medium
0654 Maximum Binary Tree C++ Medium
0653 Two Sum IV - Input is a BST C++ Easy
0652 Find Duplicate Subtrees C++ Medium
0651 4 Keys Keyboard C++ Medium
0648 Replace Words C++ Medium
0647 Palindromic Substrings C++ Medium
0646 Maximum Length of Pair Chain C++ Medium
0641 Design Circular Deque C++ Medium
0640 Solve the Equation C++ Medium
0639 Decode Ways II C++ Hard
0632 Smallest Range Covering Elements from K Lists C++ Hard
0630 Course Schedule III C++ Hard
0629 K Inverse Pairs Array C++ Hard
0621 Task Scheduler C++ Medium
0617 Merge Two Binary Trees C++ Easy
0605 Can Place Flowers C++ Easy
0600 Non-negative Integers without Consecutive Ones C++ Hard
0590 N-ary Tree Postorder Traversal C++ Easy
0581 Shortest Unsorted Continuous Subarray C++ Medium
0572 Subtree of Another Tree C++ Easy
0567 Permutation in String C++ Medium
0560 Subarray Sum Equals K C++ Medium
0557 Reverse Words in a String III C++ Easy
0552 Student Attendance Record II C++ Hard
0551 Student Attendance Record I C++ Easy
0547 Number of Provinces C++ Medium
0546 Remove Boxes C++ Hard
0543 Diameter of Binary Tree C++ Easy
0542 01 Matrix C++ Medium
0540 Single Element in a Sorted Array C++ Medium
0539 Minimum Time Difference C++ Medium
0538 Convert BST to Greater Tree C++ Medium
0529 Minesweeper C++ Medium
0528 Random Pick with Weight C++ Medium
0525 Contiguous Array C++ Medium
0522 Longest Uncommon Subsequence II C++ Medium
0518 Coin Change II C++ Medium
0517 Super Washing Machines C++ Hard
0516 Longest Palindromic Subsequence C++ Medium
0514 Freedom Trail C++ Hard
0509 Fibonacci Number C++ Easy
0502 IPO C++ Hard
0486 Predict the Winner C++ Medium
0481 Magical String C++ Medium
0480 Sliding Window Median C++ Hard
0494 Target Sum C++ Medium
0493 Reverse Pairs C++ Hard
0475 Heaters C++ Medium
0474 Ones and Zeroes C++ Medium
0473 Matchsticks to Square C++ Medium
0467 Unique Substrings in Wraparound String C++ Medium
0465 Optimal Account Balancing🔒 C++ Hard
0464 Can I Win C++ Medium
0461 Hamming Distance C++ Easy
0460 LFU Cache C++ Hard
0455 Assign Cookies C++ Easy
0454 4Sum II C++ Medium
0449 Serialize and Deserialize BST C++ Medium
0448 Find All Numbers Disappeared in an Array C++ Easy
0447 Number of Boomerangs C++ Medium
0446 Count The Repetitions C++ Hard
0445 Add Two Numbers II C++ Medium
0444 Sequence Reconstruction C++ Medium
0438 Find All Anagrams in a String C++ Medium
0437 Path Sum III C++ Medium
0436 Find Right Interval C++ Medium
0432 All O`one Data Structure C++ Hard
0430 Flatten a Multilevel Doubly Linked List C++ Medium
0429 N-ary Tree Level Order Traversal C++ Medium
0421 Maximum XOR of Two Numbers in an Array C++ Medium
0419 Battleships in a Board C++ Medium
0416 Partition Equal Subset Sum C++ Medium
0415 Add Strings C++ Easy
0412 Fizz Buzz C++ Easy
0410 Split Array Largest Sum C++ Hard
0409 Longest Palindrome C++ Easy
0407 Trapping Rain Water II C++ Hard
0406 Queue Reconstruction by Height C++ Medium
0402 Remove K Digits C++ Medium
0400 Nth Digit C++ Medium
0399 Evaluate Division C++ Medium
0395 Longest Substring with At Least K Repeating Characters C++ Medium
0394 Decode String C++ Medium
0387 First Unique Character in a String C++ Easy
0386 Lexicographical Numbers C++ Medium
0384 Shuffle an Array C++ Medium
0381 Insert Delete GetRandom O(1) - Duplicates allowed C++ Hard
0380 Insert Delete GetRandom O(1) C++ Medium
0378 Kth Smallest Element in a Sorted Matrix C++ Medium
0377 Combination Sum IV C++ Medium
0373 Find K Pairs with Smallest Sums C++ Medium
0371 Sum of Two Integers C++ Medium
0357 Count Numbers with Unique Digits C++ Medium
0354 Russian Doll Envelopes C++ Hard
0350 Intersection of Two Arrays II C++ Easy
0349 Intersection of Two Arrays C++ Easy
0348 Design Tic-Tac-Toe C++ Medium
0347 Top K Frequent Elements C++ Medium
0346 Moving Average from Data Stream C++ Easy
0344 Reverse String C++ Easy
0343 Integer Break C++ Medium
0341 Flatten Nested List Iterator C++ Medium
0340 Longest Substring with At Most K Distinct Characters C++ Medium
0338 Counting Bits C++ Easy
0337 House Robber III C++ Medium
0334 Increasing Triplet Subsequence C++ Medium
0333 Largest BST Subtree🔒 C++ Medium
0329 Longest Increasing Path in a Matrix C++ Hard
0328 Odd Even Linked List C++ Medium
0327 Count of Range Sum C++ Hard
0326 Power of Three C++ Easy
0324 Wiggle Sort II C++ Medium
0322 Coin Change C++ Medium
0321 Create Maximum Number C++ Hard
0318 Maximum Product of Word Lengths C++ Medium
0316 Remove Duplicate Letters C++ Medium
0315 Count of Smaller Numbers After Self C++ Hard
0312 Burst Balloons C++ Hard
0310 Minimum Height Trees C++ Medium
0309 Best Time to Buy and Sell Stock with Cooldown C++ Medium
0308 Range Sum Query 2D - Mutable🔒 C++ Hard
0307 Range Sum Query - Mutable C++ Medium
0304 Range Sum Query 2D - Immutable C++ Medium
0303 Range Sum Query - Immutable C++ Easy
0301 Remove Invalid Parentheses C++ Hard
0300 Longest Increasing Subsequence C++ Medium
0299 Bulls and Cows C++ Medium
0297 Serialize and Deserialize Binary Tree C++ Hard
0295 Find Median from Data Stream C++ Hard
0292 Nim Game C++ Easy
0289 Game of Life C++ Medium
0287 Find the Duplicate Number C++ Medium
0285 Inorder Successor in BST C++ Medium
0283 Move Zeroes C++ Easy
0279 Perfect Squares C++ Medium
0277 Find the Celebrity C++ Medium
0275 H-Index II C++ Medium
0269 Alien Dictionary C++ Hard
0268 Missing Number C++ Easy
0264 Ugly Number II C++ Medium
0260 Single Number III C++ Medium
0256 Paint House🔒 C++ Medium
0253 Meeting Rooms II🔒 C++ Medium
0251 Flatten 2D Vector C++ Medium
0242 Valid Anagram C++ Easy
0240 Search a 2D Matrix II C++ Medium
0239 Sliding Window Maximum C++ Hard
0238 Product of Array Except Self C++ Medium
0237 Delete Node in a Linked List C++ Medium
0236 Lowest Common Ancestor of a Binary Tree C++ Medium
0235 Lowest Common Ancestor of a Binary Search Tree C++ Medium
0234 Palindrome Linked List C++ Easy
0233 Number of Digit One C++ Hard
0232 Implement Queue using Stacks C++ Easy
0231 Power of Two C++ Easy
0230 Kth Smallest Element in a BST C++ Medium
0229 Majority Element II C++ Medium
0227 Basic Calculator II C++ Medium
0226 Invert Binary Tree C++ Easy
0222 Count Complete Tree Nodes C++ Easy
0221 Maximal Square C++ Medium
0220 Contains Duplicate III C++ Hard
0219 Contains Duplicate II C++ Easy
0218 The Skyline Problem C++ Hard
0217 Contains Duplicate C++ Easy
0215 Kth Largest Element in an Array C++ Medium
0213 House Robber II C++ Medium
0212 Word Search II C++ Hard
0210 Course Schedule II C++ Medium
0209 Minimum Size Subarray Sum C++ Medium
0208 Implement Trie (Prefix Tree) C++ Medium
0207 Course Schedule C++ Medium
0206 Reverse Linked List C++ Easy
0204 Count Primes C++ Medium
0202 Happy Number C++ Easy
0201 Bitwise AND of Numbers Range C++ Medium
0200 Number of Islands C++ Medium
0199 Binary Tree Right Side View C++ Medium
0198 House Robber C++ Medium
0191 Number of 1 Bits C++ Easy
0190 Reverse Bits C++ Easy
0189 Rotate Array C++ Medium
0188 Best Time to Buy and Sell Stock IV C++ Hard
0179 Largest Number C++ Medium
0173 Binary Search Tree Iterator C++ Medium
0172 Factorial Trailing Zeroes C++ Medium
0171 Excel Sheet Column Number C++ Easy
0169 Majority Element C++ Easy
0167 Two Sum II - Input Array Is Sorted C++ Medium
0166 Fraction to Recurring Decimal C++ Medium
0165 Compare Version Numbers C++ Medium
0163 Missing Ranges C++ Easy
0162 Find Peak Element C++ Medium
0160 Intersection of Two Linked Lists C++ Easy
0155 Min Stack C++ Medium
0154 Find Minimum in Rotated Sorted Array II C++ Hard
0153 Find Minimum in Rotated Sorted Array C++ Medium
0152 Maximum Product Subarray C++ Medium
0150 Max Points on a Line C++ Medium
0149 Max Points on a Line C++ Hard
0148 Sort List C++ Medium
0146 LRU Cache C++ Medium
0145 Binary Tree Postorder Traversal C++ Easy
0144 Binary Tree Preorder Traversal C++ Easy
0143 Reorder List C++ Medium
0142 Linked List Cycle II C++ Medium
0141 Linked List Cycle C++ Easy
0140 Word Break II C++ Hard
0139 Word Break C++ Medium
0138 Copy List with Random Pointer C++ Medium
0136 Single Number C++ Easy
0134 Gas Station C++ Medium
0133 Clone Graph C++ Medium
0132 Palindrome Partitioning II C++ Hard
0131 Palindrome Partitioning C++ Medium
0130 Surrounded Regions C++ Medium
0129 Sum Root to Leaf Numbers C++ Medium
0128 Longest Consecutive Sequence C++ Medium
0127 Word Ladder C++ Hard
0126 Word Ladder II C++ Hard
0125 Valid Palindrome C++ Easy
0124 Binary Tree Maximum Path Sum C++ Hard
0123 Best Time to Buy and Sell Stock III C++ Hard
0122 Best Time to Buy and Sell Stock II C++ Medium
0121 Best Time to Buy and Sell Stock C++ Easy
0120 Triangle C++ Medium
0118 Pascal's Triangle C++ Easy
0116 Populating Next Right Pointers in Each Node C++ Medium
0115 Distinct Subsequences C++ Hard
0114 Flatten Binary Tree to Linked List C++ Medium
0113 Path Sum II C++ Medium
0111 Minimum Depth of Binary Tree C++ Easy
0110 Balanced Binary Tree C++ Easy
0108 Convert Sorted Array to Binary Search Tree C++ Easy
0106 Construct Binary Tree from Inorder and Postorder Traversal C++ Medium
0105 Construct Binary Tree from Preorder and Inorder Traversal C++ Medium
0104 Maximum Depth of Binary Tree C++ Easy
0103 Binary Tree Zigzag Level Order Traversal C++ Medium
0102 Binary Tree Level Order Traversal C++ Medium
0101 Symmetric Tree C++ Easy
0098 Validate Binary Search Tree C++ Medium
0097 Interleaving String C++ Medium
0096 Unique Binary Search Trees C++ Medium
0094 Binary Tree Inorder Traversal C++ Easy
0093 Restore IP Addresses C++ Medium
0092 Reverse Linked List II C++ Medium
0091 Decode Ways C++ Medium
0090 Subsets II C++ Medium
0089 Gray Code C++ Medium
0088 Merge Sorted Array C++ Easy
0087 Scramble String C++ Hard
0085 Maximal Rectangle C++ Hard
0084 Largest Rectangle in Histogram C++ Hard
0081 Search in Rotated Sorted Array II C++ Medium
0079 Word Search C++ Medium
0078 Subsets C++ Medium
0077 Combinations C++ Medium
0076 Minimum Window Substring C++ Hard
0075 Sort Colors C++ Medium
0074 Search a 2D Matrix C++ Medium
0073 Set Matrix Zeroes C++ Medium
0072 Edit Distance C++ Hard
0070 Climbing Stairs C++ Easy
0069 Sqrt(x) C++ Easy
0067 Add Binary C++ Easy
0066 Plus One C++ Easy
0064 Minimum Path Sum C++ Medium
0062 Unique Paths C++ Medium
0061 Rotate List C++ Medium
0060 Permutation Sequence C++ Hard
0059 Spiral Matrix II C++ Medium
0057 Insert Interval C++ Medium
0056 Merge Intervals C++ Medium
0055 Jump Game C++ Medium
0054 Spiral Matrix C++ Medium
0053 Maximum Subarray C++ Medium
0052 N-Queens II C++ Hard
0050 Pow(x, n) C++ Medium
0049 Group Anagrams C++ Medium
0048 Rotate Image C++ Medium
0047 Permutations II C++ Medium
0046 Permutations C++ Medium
0045 Jump Game II C++ Medium
0044 Wildcard Matching C++ Hard
0043 Multiply Strings C++ Medium
0042 Trapping Rain Water C++ Hard
0041 First Missing Positive C++ Hard
0040 Combination Sum II C++ Medium
0039 Combination Sum C++ Medium
0038 Count and Say C++ Medium
0037 Sudoku Solver C++ Hard
0036 Valid Sudoku C++ Medium
0035 Search Insert Position C++ Easy
0034 Find First and Last Position of Element in Sorted Array C++ Medium
0033 Search in Rotated Sorted Array C++ Medium
0031 Next Permutation C++ Medium
0030 Substring with Concatenation of All Words C++ Hard
0032 Longest Valid Parentheses C++ Hard
0029 Divide Two Integers C++ Medium
0028 Find the Index of the First Occurrence in a String C++ Easy
0026 Remove Duplicates from Sorted Array C++ Easy
0025 Reverse Nodes in k-Group C++ Hard
0023 Merge k Sorted Lists C++ Hard
0022 Generate Parentheses C++ Medium
0021 Merge Two Sorted Lists C++ Easy
0020 Valid Parentheses C++ Easy
0019 Remove Nth Node From End of List C++ Medium
0017 Letter Combinations of a Phone Number C++ Medium
0016 3Sum Closest C++ Medium
0015 3Sum C++ Medium
0014 Longest Common Prefix C++ Easy
0013 Roman to Integer C++ Easy
0012 Integer to Roman C++ Medium
0011 Container With Most Water C++ Medium
0010 Regular Expression Matching C++ Hard
0009 Palindrome Number C++ Easy
0008 String to Integer (atoi) C++ Medium
0007 Reverse Integer C++ Medium
0005 Longest Palindromic Substring C++ Medium
0004 Median of Two Sorted Arrays C++ Hard
0003 Longest Substring Without Repeating Characters C++ Medium
0002 Add Two Numbers C++ Medium
0001 Two Sum C++ Easy

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