205. 同构字符串 205. Isomorphic Strings…

题目链接 题目要求: Given two strings s and t, determine if they are isomorphic. Two strings are isomorphic if the characters in s can be replaced to get t. All occurrences of a character must be replaced with another character while preserving the order of c…

题目 Given two strings s and t, determine if they are isomorphic. Two strings are isomorphic if the characters in s can be replaced to get t. All occurrences of a character must be replaced with another character while preserving the order of character…

1. Two Sum 题目链接 题目要求: Given an array of integers, find two numbers such that they add up to a specific target number. The function twoSum should return indices of the two numbers such that they add up to the target, where index1 must be less than ind…

#-*- coding: UTF-8 -*- #转换法class Solution(object):    def isIsomorphic(self, s, t):        """        :type s: str        :type t: str        :rtype: bool        """        sdic={}        slist=[]        tdic={}        tlist=…

 1. Contains Duplicate 题目链接 题目要求: Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice in the array, and it should return false if every element is distinct. 代码如下:…

题目链接 题目要求: Given an array of integers, every element appears twice except for one. Find that single one. Note: Your algorithm should have a linear runtime complexity. Could you implement it without using extra memory? 这道题属于比较简单的,程序如下: class Solution…

题目链接 题目要求: Determine if a Sudoku is valid, according to: Sudoku Puzzles - The Rules. The Sudoku board could be partially filled, where empty cells are filled with the character '.'. A partially filled sudoku which is valid. Note: A valid Sudoku board…

给定一个整数数组和一个目标值,找出数组中和为目标值的两个数. 你可以假设每个输入只对应一种答案,且同样的元素不能被重复利用. 示例: 给定 nums = [2, 7, 11, 15], target = 9 因为 nums[0] + nums[1] = 2 + 7 = 9 所以返回 [0, 1] Java新手 写的第一题Leetcode 代码如下 public class Solution { public int[] twoSum(int[] nums, int target) { int a…

Isomorphic Strings Total Accepted: 30898 Total Submissions: 120944 Difficulty: Easy Given two strings s and t, determine if they are isomorphic. Two strings are isomorphic if the characters in s can be replaced to get t. All occurrences of a characte…