# 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 17. Letter Combinations of a Phone Number

Description https://leetcode.com/problems/letter-combinations-of-a-phone-number/description/ Given a string containing digits from 2-9 inclusive, return all possible letter combinations that the number could represent. A mapping…

# LeetCode 18. 4Sum

Description https://leetcode.com/problems/4sum/description/ Given an array nums of n integers and an integer target, are there elements a, b, c, and d in nums such that a + b + c + d = target? Find all unique quadruplets in the array…

# LeetCode 26. Remove Duplicates from Sorted Array

Description https://leetcode.com/problems/remove-duplicates-from-sorted-array/description/ Given a sorted array nums, remove the duplicates in-place such that each element appear only once and return the new length. Do not…

# 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…