John Will的博客

题目描述You are given a string, S, and a list of words, L, that are all of the same length. Find all starting indices of substring(s) in S that is a concatenation of each word in L exactly once and wit...

题目描述Implement strStr(). Returns a pointer to the first occurrence of needle in haystack, or null if needle is not part of haystack. 这道题让我们在一个字符串中找另一个字符串第一次出现的位置，那我们首先要做一些判断，如果子字符串为空，则返回0，如果子字符串长度大...

题目描述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...

题目描述There are two sorted arrays A and B of size m and n respectively. Find the median of the two sorted arrays. The overall run time complexity should be O(log (m+n)). 解题思路：将两个有序数组合并为一个，设置一个 map<...