# -*- coding: utf8 -*-'''__author__ = 'dabay.wang@gmail.com' 28: Implement strStr()https://oj.leetcode.com/problems/implement-strstr/ Implement strStr().Returns the index of the first occurrence of needle in haystack, or -1 if needle is not part of h…

Implement strStr(). Return the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack. Example 1: Input: haystack = "hello", needle = "ll" Output: 2 Example 2: Input: haystack = "aaaaa",…

Implement strStr(). Returns the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack. 解题思路一: 暴力枚举,JAVA实现如下: static public int strStr(String haystack, String needle) { for(int i=0;i<=haystack.length()-needle.len…

题目要求:Implement strStr() Implement strStr(). Returns the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack. Java: public int strStr(String haystack, String needle) { if (haystack == null || needle == null) {…

Implement strStr(). Returns the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack. 注:直接看题目可能会有些偏差,因为容易认为 needle是一个字符,那就也太容易了,实则,haystack和needle都是字符串(注意是字符串不是数组) 解法思路: 暴力搜索: public class Solution { public int…

Implement strStr(). Returns a pointer to the first occurrence of needle in haystack, or null if needle is not part of haystack. 就是判断haystack中是否有needle,如果包含的话,返回第一次包含的地址.如果没有则返回NULL. 这题官网打出来的是easy,但是要做好绝不简单.我能想到的就是O(m*n)的复杂度了.最经典的是用KMP算法. class Soluti…

Implement strStr(). Returns the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack. 实现strStr(). 返回haystack中第一次出现针的索引,如果针不是haystack的一部分,则返回-1. int len=0; if("".equals(needle)) //匹配字符串为空直接返回0 return 0; if(…

题目 Implement strStr(). Returns the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack. Update (2014-11-02): The signature of the function had been updated to return the index instead of the pointer. If you st…

1.题目 28. Implement strStr()——Easy Implement strStr(). Return the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack. Example 1: Input: haystack = "hello", needle = "ll" Output: 2 Example 2: Inp…

实现 strStr().返回蕴含在 haystack 中的 needle 的第一个字符的索引,如果 needle 不是 haystack 的一部分则返回 -1 .例 1:输入: haystack = "hello", needle = "ll"输出: 2例 2:输入: haystack = "aaaaa", needle = "bba"输出: -1详见:https://leetcode.com/problems/impleme…