# LeetCode 387. First Unique Character in a String

Description https://leetcode.com/problems/first-unique-character-in-a-string/description/ Given a string, find the first non-repeating character in it and return it’s index. If it doesn’t exist,…

# LeetCode 278. First Bad Version

Description https://leetcode.com/problems/first-bad-version/description/ You are a product manager and currently leading a team to develop a new product. Unfortunately, the latest…

# LeetCode 139. Word Break

Description https://leetcode.com/problems/word-break/description/ Given a non-empty string s and a dictionary wordDict containing a list of non-empty words, determine if s can be segmented into a space-separated sequence of one or…

# LeetCode 104. Maximum Depth of Binary Tree

Description https://leetcode.com/problems/maximum-depth-of-binary-tree/description/ Given a binary tree, find its maximum depth. The maximum depth is the number of nodes along the…

# LeetCode 4. Median of Two Sorted Arrays

Description https://leetcode.com/problems/median-of-two-sorted-arrays/ There are two sorted arrays nums1 and nums2 of size m and n respectively. Find the median of…