171. Excel Sheet Column Number https://leetcode.com/problems/excel-sheet...

242. Valid Anagram https://leetcode.com/problems/valid-anagram/descripti...

描述 Given a string representing one Unicode character, return an integer ...

409. Longest Palindrome https://leetcode.com/problems/longest-palindrome...

125. Valid Palindrome https://leetcode.com/problems/valid-palindrome/des...

描述 Python isalnum() 方法检测字符串是否由字母和数字组成。 语法 isalnum()方法语法： 返回值 如果 string 至...

51. N-Queens https://leetcode.com/problems/n-queens/description/ 该类题目主要思...

651. Binary Tree Vertical Order Traversal https://www.lintcode.com/probl...

Python中除法有两种运算符：’/’和’//’. X / Y类型：在Python2.6或者之前，这个操作对于整数运算会省去小数部分，而对于浮点...