每周一题，不限语言实现 使用最规范的语言实现，包括注释，语法，结构等 此项目用来提升自己，不具任何商业用途，纯属个人爱好 Problem SubTitle First: Longest Substring Without Repeating Character. sanjiaotie.com.goodcooder.Second: Implement next permutation, which rearranges numbers into the lexicographically next greater permutation of numbers. sanjiaotie.com.goodcooder.Third: sum-three Forth: Implement strStr() Fifth:Longest Valid Parentheses sanjiaotie.com.goodcooder.Sixth: Two Sum sanjiaotie.com.goodcooder.Seventh: Add Two Numbers Nigth: find Meditor in Two Sorted Array