原文链接: https://leetcode-cn.com/problems/first-unique-character-in-a-string
英文原文Given a string s, find the first non-rep
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原文链接: https://leetcode-cn.com/problems/find-the-difference
英文原文You are given two strings s and t.
String t is generat
原文链接: https://leetcode-cn.com/problems/is-subsequence
英文原文Given two strings s and t, return true if s is a subsequence
原文链接: https://leetcode-cn.com/problems/sum-of-left-leaves
英文原文Given the root of a binary tree, return the sum of all l
原文链接: https://leetcode-cn.com/problems/convert-a-number-to-hexadecimal
英文原文Given an integer num, return a string repre
原文链接: https://leetcode-cn.com/problems/longest-palindrome
英文原文Given a string s which consists of lowercase or uppercas
原文链接: https://leetcode-cn.com/problems/binary-watch
英文原文A binary watch has 4 LEDs on the top which represent the hours
原文链接: https://leetcode-cn.com/problems/fizz-buzz
英文原文Given an integer n, return a string array answer (1-indexed) wher
原文链接: https://leetcode-cn.com/problems/third-maximum-number
英文原文Given an integer array nums, return the third distinct
原文链接: https://leetcode-cn.com/problems/add-strings
英文原文Given two non-negative integers, num1 and num2 represented as s