# LeetCode-Notes **Repository Path**: runcoderhang/LeetCode-Notes ## Basic Information - **Project Name**: LeetCode-Notes - **Description**: :books: LeetCode每日一题打卡活动记录 - **Primary Language**: Unknown - **License**: Not specified - **Default Branch**: master - **Homepage**: None - **GVP Project**: No ## Statistics - **Stars**: 0 - **Forks**: 0 - **Created**: 2020-09-02 - **Last Updated**: 2020-12-19 ## Categories & Tags **Categories**: Uncategorized **Tags**: None ## README [![GitHub stars](https://img.shields.io/github/stars/RunCoderHang/LeetCode-Notes?style=flat-square)](https://github.com/RunCoderHang/LeetCode-Notes/stargazers) [![GitHub forks](https://img.shields.io/github/forks/RunCoderHang/LeetCode-Notes?color=green&label=forks&style=flat-square)](https://github.com/RunCoderHang/LeetCode-Notes/network/members) [![GitHub issues](https://img.shields.io/github/issues/RunCoderHang/LeetCode-Notes?color=yellow&style=flat-square)](https://github.com/RunCoderHang/LeetCode-Notes/issues) ## LeetCode **LeetCode** 在 2020-03-01 推出了每日一题活动。借此打卡！ [`Markdown-Emoji`](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/image/markdown-emoji.md) | ID | Difficulty | Solution | Series | Finish Time | Java | C | C++ | Address | |--------|------------|---------------------------------------------------------------------------------------------------------------------------------------------|----------|-------------|------|---|-----|--------------------------------------------------------------------------------------------------| | 1 | ☆ | [两数之和](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/two-sum.md) | | 2019-02-29 | ✓ | | | [Link](https://leetcode-cn.com/problems/two-sum) | | 225 | ☆ | [用队列实现栈](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/implement-stack-using-queues.md) | 每日一题 | 2020-03-01 | | ✓ | | [Link](https://leetcode-cn.com/problems/implement-stack-using-queues) | | 206 | ☆ | [反转链表](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/reverse-linked-list.md) | 每日一题 | 2020-03-02 | | ✓ | | [Link](https://leetcode-cn.com/problems/reverse-linked-list) | | 面试题 | ☆ | [合并排序的数组](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/sorted-merge-lcci.md) | 每日一题 | 2020-03-03 | | ✓ | ✓ | [Link](https://leetcode-cn.com/problems/sorted-merge-lcci) | | 994 | ☆☆ | [腐烂的橘子](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/rotting-oranges.md) | 每日一题 | 2020-03-04 | | ✓ | | [Link](https://leetcode-cn.com/problems/rotting-oranges) | | 1103 | ☆ | [分糖果Ⅱ](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/distribute-candies-to-people.md) | 每日一题 | 2020-03-05 | | ✓ | | [Link](https://leetcode-cn.com/problems/distribute-candies-to-people) | | 面试题 | ☆ | [和为s的连续正数序列](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/he-wei-sde-lian-xu-zheng-shu-xu-lie-lcof.md) | 每日一题 | 2020-03-06 | | ✓ | | [Link](https://leetcode-cn.com/problems/he-wei-sde-lian-xu-zheng-shu-xu-lie-lcof/) | | 面试题 | ☆☆ | [队列的最大值](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/dui-lie-de-zui-da-zhi-lcof.md) | 每日一题 | 2020-03-07 | | ✓ | | [Link](https://leetcode-cn.com/problems/dui-lie-de-zui-da-zhi-lcof/) | | 5 | ☆☆ | [最长回文子串](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/longest-palindromic-substring.md) | | 2020-03-08 | | | ✓ | [Link](https://leetcode-cn.com/problems/longest-palindromic-substring/) | | 322 | ☆☆ | [零钱兑换](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/coin-change.md) | 每日一题 | 2020-03-08 | | ✓ | ✓ | [Link](https://leetcode-cn.com/problems/coin-change/) | | 121 | ☆ | [买卖股票的最佳时机](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/best-time-to-buy-and-sell-stock.md) | 每日一题 | 2020-03-09 | | ✓ | ✓ | [Link](https://leetcode-cn.com/problems/best-time-to-buy-and-sell-stock/) | | 543 | ☆ | [二叉树的直径](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/diameter-of-binary-tree.md) | 每日一题 | 2020-03-10 | | ✓ | ✓ | [Link](https://leetcode-cn.com/problems/diameter-of-binary-tree/) | | 1013 | ☆ | [将数组分成和相等的三个部分](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/partition-array-into-three-parts-with-equal-sum.md) | 每日一题 | 2020-03-11 | | ✓ | ✓ | [Link](https://leetcode-cn.com/problems/partition-array-into-three-parts-with-equal-sum/) | | 1071 | ☆ | [字符串的最大公因子](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/greatest-common-divisor-of-strings.md) | 每日一题 | 2020-03-12 | | ✓ | ✓ | [Link](https://leetcode-cn.com/problems/greatest-common-divisor-of-strings/) | | 169 | ☆ | [多数元素](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/majority-element.md) | 每日一题 | 2020-03-13 | ✓ | ✓ | ✓ | [Link](https://leetcode-cn.com/problems/majority-element/) | | 300 | ☆☆ | [最长上升子序列](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/longest-increasing-subsequence.md) | 每日一题 | 2020-03-14 | | | ✓ | [Link](https://leetcode-cn.com/problems/longest-increasing-subsequence/) | | 695 | ☆☆ | [岛屿的最大面积](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/max-area-of-island.md) | 每日一题 | 2020-03-15 | | | ✓ | [Link](https://leetcode-cn.com/problems/max-area-of-island/) | | 面试题 | ☆ | [字符串的压缩](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/compress-string-lcci.md) | 每日一题 | 2020-03-16 | | | ✓ | [Link](https://leetcode-cn.com/problems/compress-string-lcci/) | | 1160 | ☆ | [拼写单词](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/find-words-that-can-be-formed-by-characters.md) | 每日一题 | 2020-03-17 | | | ✓ | [Link](https://leetcode-cn.com/problems/find-words-that-can-be-formed-by-characters) | | 836 | ☆ | [矩形重叠](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/rectangle-overlap.md) | 每日一题 | 2020-03-18 | | ✓ | ✓ | [Link](https://leetcode-cn.com/problems/rectangle-overlap/) | | 409 | ☆ | [最长回文串](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/longest-palindrome.md) | 每日一题 | 2020-03-19 | | ✓ | ✓ | [Link](https://leetcode-cn.com/problems/longest-palindrome/) | | 面试题 | ☆ | [最小的k个数](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/zui-xiao-de-kge-shu-lcof.md) | 每日一题 | 2020-03-20 | | | ✓ | [Link](https://leetcode-cn.com/problems/zui-xiao-de-kge-shu-lcof/) | | 365 | ☆☆ | [水壶问题](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/water-and-jug-problem.md) | 每日一题 | 2020-03-21 | | | ✓ | [Link](https://leetcode-cn.com/problems/water-and-jug-problem/) | | 945 | ☆☆ | [使数组唯一的最小增量](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/minimum-increment-to-make-array-unique.md) | 每日一题 | 2020-03-22 | | | ✓ | [Link](https://leetcode-cn.com/problems/minimum-increment-to-make-array-unique/) | | 876 | ☆ | [链表的中间结点](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/middle-of-the-linked-list.md) | 每日一题 | 2020-03-23 | | | ✓ | [Link](https://leetcode-cn.com/problems/middle-of-the-linked-list/) | | 面试题 | ☆ | [按摩师](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/the-masseuse-lcci.md) | 每日一题 | 2020-03-24 | | | ✓ | [Link](https://leetcode-cn.com/problems/the-masseuse-lcci/) | | 892 | ☆ | [三维形体的表面积](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/surface-area-of-3d-shapes.md) | 每日一题 | 2020-03-25 | | | ✓ | [Link](https://leetcode-cn.com/problems/surface-area-of-3d-shapes/) | | 999 | ☆ | [可以被一步捕获的棋子数](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/available-captures-for-rook.md) | 每日一题 | 2020-03-26 | | | ✓ | [Link](https://leetcode-cn.com/problems/available-captures-for-rook/) | | 914 | ☆ | [卡牌分组](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/x-of-a-kind-in-a-deck-of-cards.md) | 每日一题 | 2020-03-27 | | | ✓ | [Link](https://leetcode-cn.com/problems/x-of-a-kind-in-a-deck-of-cards/) | | 820 | ☆☆ | [单词的压缩编码](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/short-encoding-of-words.md) | 每日一题 | 2020-03-28 | | | ✓ | [Link](https://leetcode-cn.com/problems/short-encoding-of-words/) | | 162 | ☆☆ | [地图分析](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/as-far-from-land-as-possible.md) | 每日一题 | 2020-03-29 | | | ✓ | [Link](https://leetcode-cn.com/problems/as-far-from-land-as-possible/) | | 面试题 | ☆ | [圆圈中最后剩下的数字](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/yuan-quan-zhong-zui-hou-sheng-xia-de-shu-zi-lcof.md) | 每日一题 | 2020-03-30 | ✓ | | ✓ | [Link](https://leetcode-cn.com/problems/yuan-quan-zhong-zui-hou-sheng-xia-de-shu-zi-lcof/) | | 912 | ☆☆ | [排序数组](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/sort-an-array.md) | 每日一题 | 2020-03-31 | | | ✓ | [Link](https://leetcode-cn.com/problems/sort-an-array/) | | 1111 | ☆☆ | [有效括号的嵌套深度](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/maximum-nesting-depth-of-two-valid-parentheses-strings.md) | 每日一题 | 2020-04-01 | | | ✓ | [Link](https://leetcode-cn.com/problems/maximum-nesting-depth-of-two-valid-parentheses-strings/) | | 289 | ☆☆ | [生命游戏](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/game-of-life.md) | 每日一题 | 2020-04-02 | | | ✓ | [Link](https://leetcode-cn.com/problems/game-of-life/) | | 8 | ☆☆ | [字符串转换整数(atoi)](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/string-to-integer-atoi.md) | 每日一题 | 2020-04-03 | ✓ | | ✓ | [Link](https://leetcode-cn.com/problems/string-to-integer-atoi/) | | 42 | ☆☆☆ | [接雨水](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/trapping-rain-water.md) | 每日一题 | 2020-04-04 | | | ✓ | [Link](https://leetcode-cn.com/problems/trapping-rain-water/) | | 460 | ☆☆☆ | [LFU缓存](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/lfu-cache.md) | 每日一题 | 2020-04-05 | | | ✓ | [Link](https://leetcode-cn.com/problems/lfu-cache/) | | 72 | ☆☆☆ | [编辑距离](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/edit-distance.md) | 每日一题 | 2020-04-06 | | | ✓ | [Link](https://leetcode-cn.com/problems/edit-distance/) | | 面试题 | ☆☆ | [旋转矩阵](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/rotate-matrix-lcci.md) | 每日一题 | 2020-04-07 | | | ✓ | [Link](https://leetcode-cn.com/problems/rotate-matrix-lcci/) | | 面试题 | ☆☆ | [机器人的运动范围](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/ji-qi-ren-de-yun-dong-fan-wei-lcof.md) | 每日一题 | 2020-04-08 | | | ✓ | [Link](https://leetcode-cn.com/problems/ji-qi-ren-de-yun-dong-fan-wei-lcof/) | | 22 | ☆☆ | [括号生成](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/generate-parentheses.md) | 每日一题 | 2020-04-09 | | | ✓ | [Link](https://leetcode-cn.com/problems/generate-parentheses/) | | 151 | ☆☆ | [翻转字符串里的单词](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/reverse-words-in-a-string.md) | 每日一题 | 2020-04-10 | | | ✓ | [Link](https://leetcode-cn.com/problems/reverse-words-in-a-string/) | | 887 | ☆☆☆ | [鸡蛋掉落](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/super-egg-drop.md) | 每日一题 | 2020-04-11 | | | ✓ | [Link](https://leetcode-cn.com/problems/super-egg-drop/) | | 面试题 | ☆☆☆ | [交点](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/intersection-lcci.md) | 每日一题 | 2020-04-12 | | | ✓ | [Link](https://leetcode-cn.com/problems/intersection-lcci/) | | 355 | ☆☆ | [设计推特](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/design-twitter.md) | 每日一题 | 2020-04-13 | ✓ | | ✓ | [Link](https://leetcode-cn.com/problems/design-twitter/) | | 445 | ☆☆ | [两数相加Ⅱ](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/add-two-numbers-ii.md) | 每日一题 | 2020-04-14 | | | ✓ | [Link](https://leetcode-cn.com/problems/add-two-numbers-ii/) | | 542 | ☆☆ | [01-矩阵](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/01-matrix.md) | 每日一题 | 2020-04-15 | | | ✓ | [Link](https://leetcode-cn.com/problems/01-matrix/) | | 56 | ☆☆ | [合并区间](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/merge-intervals.md) | 每日一题 | 2020-04-16 | | | ✓ | [Link](https://leetcode-cn.com/problems/merge-intervals/) | | 55 | ☆☆ | [跳跃游戏](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/jump-game.md) | 每日一题 | 2020-04-17 | | | ✓ | [Link](https://leetcode-cn.com/problems/jump-game/) | | 11 | ☆☆ | [盛最多水的容器](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/container-with-most-water.md) | 每日一题 | 2020-04-18 | | | ✓ | [Link](https://leetcode-cn.com/problems/container-with-most-water/) | | 466 | ☆☆☆ | [统计重复个数](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/count-the-repetitions.md) | 每日一题 | 2020-04-19 | | | ✓ | [Link](https://leetcode-cn.com/problems/count-the-repetitions/) | | 200 | ☆☆ | [岛屿数量](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/number-of-islands.md) | 每日一题 | 2020-04-20 | | | ✓ | [Link](https://leetcode-cn.com/problems/number-of-islands/) | | 1248 | ☆☆ | [统计「优美子数组」](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/count-number-of-nice-subarrays.md) | 每日一题 | 2020-04-21 | | | ✓ | [Link](https://leetcode-cn.com/problems/count-number-of-nice-subarrays/) | | 面试题 | ☆☆ | [二叉树的右视图](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/binary-tree-right-side-view.md) | 每日一题 | 2020-04-22 | | | ✓ | [Link](https://leetcode-cn.com/problems/binary-tree-right-side-view/) | | 面试题 | ☆☆ | [硬币](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/coin-lcci.md) | 每日一题 | 2020-04-23 | | | ✓ | [Link](https://leetcode-cn.com/problems/coin-lcci/) | | 面试题 | ☆☆☆ | [数组中的逆序对](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/shu-zu-zhong-de-ni-xu-dui-lcof.md) | 每日一题 | 2020-04-24 | | | ✓ | [Link](https://leetcode-cn.com/problems/shu-zu-zhong-de-ni-xu-dui-lcof/) | | 46 | ☆☆ | [全排列](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/permutations.md) | 每日一题 | 2020-04-25 | | | ✓ | [Link](https://leetcode-cn.com/problems/permutations/) | | 23 | ☆☆☆ | [合并K个排列链表](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/merge-k-sorted-lists.md) | 每日一题 | 2020-04-26 | | | ✓ | [Link](https://leetcode-cn.com/problems/merge-k-sorted-lists/) | | 33 | ☆☆ | [搜索旋转排序数组](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/search-in-rotated-sorted-array.md) | 每日一题 | 2020-04-27 | | | ✓ | [Link](https://leetcode-cn.com/problems/search-in-rotated-sorted-array/) | | 面试题 | ☆☆ | [数组中数字出现的次数](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/shu-zu-zhong-shu-zi-chu-xian-de-ci-shu-lcof.md) | 每日一题 | 2020-04-28 | | | ✓ | [Link](https://leetcode-cn.com/problems/shu-zu-zhong-shu-zi-chu-xian-de-ci-shu-lcof/) | | 1095 | ☆☆☆ | [山脉数组中查找目标值](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/find-in-mountain-array.md) | 每日一题 | 2020-04-29 | | | ✓ | [Link](https://leetcode-cn.com/problems/find-in-mountain-array/) | | 202 | ☆ | [快乐数](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/happy-number.md) | 每日一题 | 2020-04-30 | | | ✓ | [Link](https://leetcode-cn.com/problems/happy-number/) | | 21 | ☆ | [合并两个有序链表](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/merge-two-sorted-lists.md) | 每日一题 | 2020-05-01 | | | ✓ | [Link](https://leetcode-cn.com/problems/merge-two-sorted-lists/) | | 3 | ☆☆ | [无重复字符的最长子串](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/longest-substring-without-repeating-characters.md) | 每日一题 | 2020-05-02 | | | ✓ | [Link](https://leetcode-cn.com/problems/longest-substring-without-repeating-characters/) | | 53 | ☆ | [最大子序和](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/maximum-subarray.md) | 每日一题 | 2020-05-03 | | | ✓ | [Link](https://leetcode-cn.com/problems/maximum-subarray/) | | 45 | ☆☆☆ | [跳跃游戏Ⅱ](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/jump-game-ii.md) | 每日一题 | 2020-05-04 | | | ✓ | [Link](https://leetcode-cn.com/problems/jump-game-ii/) | | 98 | ☆☆ | [验证二叉搜索树](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/validate-binary-search-tree.md) | 每日一题 | 2020-05-05 | | | ✓ | [Link](https://leetcode-cn.com/problems/validate-binary-search-tree/) | | 983 | ☆☆ | [最低票价](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/minimum-cost-for-tickets.md) | 每日一题 | 2020-05-06 | | | ✓ | [Link](https://leetcode-cn.com/problems/minimum-cost-for-tickets/) | ## LeetCode_America | ID | Difficulty | Solution | Series | Finish Time | Java | C | C++ | Address | |-------|------------|---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|--------|-------------|------|---|-----|--------------------------------------------------------------------------------------------------| | 136 | ☆ | [Single-Number](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/LeetCode-America/single-number.md) | 30-Day | 2020-04-01 | | | ✓ | [Link](https://leetcode.com/problems/single-number/) | | 202 | ☆ | [Happy-Number](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/LeetCode-America/happy-number.md) | 30-Day | 2020-04-02 | | | ✓ | [Link](https://leetcode.com/problems/happy-number/) | | 53 | ☆ | [Maximum-Subarray](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/LeetCode-America/maximum-subarray.md) | 30-Day | 2020-04-03 | | | ✓ | [Link](https://leetcode.com/problems/maximum-subarray/) | | 283 | ☆ | [Move-Zeroes](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/LeetCode-America/move-zeroes.md) | 30-Day | 2020-04-04 | | | ✓ | [Link](https://leetcode.com/problems/move-zeroes/) | | 122 | ☆ | [Best-Time-to-Buy-and-Sell-Stock-Ⅱ](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/LeetCode-America/best-time-to-buy-and-sell-stock-ii.md) | 30-Day | 2020-04-05 | | | ✓ | [Link](https://leetcode.com/problems/best-time-to-buy-and-sell-stock-ii/) | | 49 | ☆☆ | [Group-Anagrams](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/LeetCode-America/group-anagrams.md) | 30-Day | 2020-04-06 | | | ✓ | [Link](https://leetcode.com/problems/group-anagrams/) | | 1407 | ☆ | [Counting-Elements](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/LeetCode-America/counting-elements.md) | 30-Day | 2020-04-07 | | | ✓ | [Link](https://leetcode-cn.com/problems/counting-elements/) | | 876 | ☆ | [Middle-of-the-Linked-List](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/LeetCode-America/middle-of-the-linked-list.md) | 30-Day | 2020-04-08 | | | ✓ | [Link](https://leetcode.com/problems/middle-of-the-linked-list/) | | 844 | ☆ | [Backspace-String-Compare](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/LeetCode-America/backspace-string-compare.md) | 30-Day | 2020-04-09 | | | ✓ | [Link](https://leetcode.com/problems/backspace-string-compare/) | | 155 | ☆ | [Min-Stack](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/LeetCode-America/min-stack.md) | 30-Day | 2020-04-10 | | | ✓ | [Link](https://leetcode.com/problems/min-stack/) | | 543 | ☆ | [Diameter-of-Binary-Tree](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/LeetCode-America/diameter-of-binary-tree.md) | 30-Day | 2020-04-11 | | | ✓ | [Link](https://leetcode.com/problems/diameter-of-binary-tree/) | | 1046 | ☆ | [Last-Stone-Weight](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/LeetCode-America/last-stone-weight.md) | 30-Day | 2020-04-12 | | | ✓ | [Link](https://leetcode.com/problems/last-stone-weight/) | | 525 | ☆☆ | [Contiguous-Array](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/LeetCode-America/contiguous-array.md) | 30-Day | 2020-04-13 | | | ✓ | [Link](https://leetcode.com/problems/contiguous-array/) | | | ☆☆ | [Perform-String-Shifts](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/LeetCode-America/perform-string-shifts.md) | 30-Day | 2020-04-14 | | | ✓ | [Link](https://leetcode.com/explore/challenge/card/30-day-leetcoding-challenge/529/week-2/3299/) | | 238 | ☆☆ | [Product-of-Array-Except-Self](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/LeetCode-America/product-of-array-except-self.md) | 30-Day | 2020-04-15 | | | ✓ | [Link](https://leetcode.com/problems/product-of-array-except-self/) | | 678 | ☆☆ | [Valid-Parenthesis-String](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/LeetCode-America/valid-parenthesis-string.md) | 30-Day | 2020-04-16 | | | ✓ | [Link](https://leetcode.com/problems/valid-parenthesis-string/) | | 200 | ☆☆ | [Number-of-Islands](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/LeetCode-America/number-of-islands.md) | 30-Day | 2020-04-17 | | | ✓ | [Link](https://leetcode.com/problems/number-of-islands/) | | 64 | ☆☆ | [Minimum-Path-Sum](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/LeetCode-America/minimum-path-sum.md) | 30-Day | 2020-04-18 | | | ✓ | [Link](https://leetcode.com/problems/minimum-path-sum/) | | 33 | ☆☆ | [Search-in-Rotated-Sorted-Array](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/LeetCode-America/search-in-rotated-sorted-array.md) | 30-Day | 2020-04-19 | | | ✓ | [Link](https://leetcode.com/problems/search-in-rotated-sorted-array/) | | 1008 | ☆☆ | [Construct-Binary-Search-Tree-from-Preorder-Traversal](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/LeetCode-America/construct-binary-search-tree-from-preorder-traversal.md) | 30-Day | 2020-04-20 | | | ✓ | [Link](https://leetcode.com/problems/construct-binary-search-tree-from-preorder-traversal/) | | 10012 | ☆☆ | [Leftmost-Column-with-at-Least-a-One](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/LeetCode-America/leftmost-column-with-at-least-a-one.md) | 30-Day | 2020-04-21 | | | ✓ | [Link](https://leetcode-cn.com/problems/leftmost-column-with-at-least-a-one/) | | 560 | ☆☆ | [Subarray-Sum-Equals-K](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/LeetCode-America/subarray-sum-equals-k.md) | 30-Day | 2020-04-22 | | | ✓ | [Link](https://leetcode.com/problems/subarray-sum-equals-k/) | | 201 | ☆☆ | [Bitwise-AND-of-Numbers-Range](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/LeetCode-America/bitwise-and-of-numbers-range.md) | 30-Day | 2020-04-23 | | | ✓ | [Link](https://leetcode.com/problems/bitwise-and-of-numbers-range/) | | 146 | ☆☆ | [LRU-Cache](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/LeetCode-America/lru-cache.md) | 30-Day | 2020-04-24 | | | ✓ | [Link](https://leetcode.com/problems/lru-cache/) | | 55 | ☆☆ | [Jump-Game](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/LeetCode-America/jump-game.md) | 30-Day | 2020-04-25 | | | ✓ | [Link](https://leetcode.com/problems/jump-game/) | | 1143 | ☆☆ | [Longest-Common-Subsequence](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/LeetCode-America/longest-common-subsequence.md) | 30-Day | 2020-04-26 | | | ✓ | [Link](https://leetcode.com/problems/longest-common-subsequence/) | | 221 | ☆☆ | [Maximal-Square](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/LeetCode-America/maximal-square.md) | 30-Day | 2020-04-27 | | | ✓ | [Link](https://leetcode.com/problems/maximal-square/) | | | ☆☆ | [First-Unique-Number](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/LeetCode-America/first-unique-number.md) | 30-Day | 2020-04-28 | | | ✓ | [Link](https://leetcode.com/explore/challenge/card/30-day-leetcoding-challenge/531/week-4/3313/) | | 124 | ☆☆☆ | [Binary-Tree-Maximum-Path-Sum](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/LeetCode-America/binary-tree-maximum-path-sum.md) | 30-Day | 2020-04-29 | | | ✓ | [Link](https://leetcode.com/problems/binary-tree-maximum-path-sum/) | | | ☆☆ | [Check-If-a-String-Is-a-Valid-Sequence-from-Root-to-Leaves-Path-in-a-Binary-Tree](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/LeetCode-America/check-if-a-string-is-a-valid-sequence-from-root-to-leaves-path-in-a-binary-tree.md) | 30-Day | 2020-04-30 | | | ✓ | [Link](https://leetcode.com/explore/featured/card/30-day-leetcoding-challenge/532/week-5/3315/) | | 278 | ☆ | [First-Bad-Version](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/LeetCode-America/first-bad-version.md) | May | 2020-05-01 | | | ✓ | [Link](https://leetcode.com/problems/first-bad-version/) | | 771 | ☆ | [Jewels-and-Stones](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/LeetCode-America/jewels-and-stones.md) | May | 2020-05-02 | | | ✓ | [Link](https://leetcode.com/problems/jewels-and-stones/) | | 383 | ☆ | [Ransom-Note](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/LeetCode-America/ransom-note.md) | May | 2020-05-03 | | | ✓ | [Link](https://leetcode.com/problems/ransom-note/) | | 476 | ☆ | [Number-Complement](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/LeetCode-America/number-complement.md) | May | 2020-05-04 | | | ✓ | [Link](https://leetcode.com/problems/number-complement/) | | 387 | ☆ | [First-Unique-Character-in-a-String](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/LeetCode-America/first-unique-character-in-a-string.md) | May | 2020-05-05 | | | ✓ | [Link](https://leetcode.com/problems/first-unique-character-in-a-string/) | | 169 | ☆ | [Majority-Element](https://github.com/RunCoderHang/LeetCode-Notes/blob/master/LeetCode-America/majority-element.md) | May | 2020-05-06 | | | ✓ | [Link](https://leetcode.com/problems/majority-element/) | ## Contact me