LeetCode 28: Find the Index of the First Occurrence in a String 心路历程 一开始迅猛完成了一个版本,然后忽略了这种情况 "mississippi" "issip" 这样我会第一个在ssippi第二个在issip这样就找不到了 highlighter- C++ classSolution{public:intstrStr(string haystack, string needle){/* find the first n...
Given an array of positive integers. All numbers occur even number of times except one number which occurs odd number of times. Find the number in O(n) time & constant space. Example: I/P = [ 1, 2, 3, 2, 3, 1, 3] O/P = 3 ASimple Solutionis to run two nested loops. The...
Given two stringsneedleandhaystack, return the index of the first occurrence ofneedleinhaystack, or-1ifneedleis not part ofhaystack. implSolution{pubfnstr_str(haystack:String,needle:String)->i32{lethlen=haystack.len();letnlen=needle.len();ifhlen<nlen{return-1;}foriin0..=(hlen-nlen){if&...
- LeetCodeleetcode.com/problems/find-the-index-of-the-first-occurrence-in-a-string/description/ 解题思路 二重循环,没什么特别的 class Solution { public: int strStr(string haystack, string needle) { int index = 0; bool flag = true; for(int i = 0; i < haystack.size(); i++) { ...
sorted arrays sort k-sorted array n max pair combinations searching coding problems finding first bad version maximum value in a bitonic array search for a range floor and ceil value first and last occurrence of an element find minimum in rotated sorted array coding algorithms run-length encoding...
The first occurrence is at index 0, so we return 0. Example 2: Input:haystack = "leetcode", needle = "leeto"Output:-1Explanation:"leeto" did not occur in "leetcode", so we return -1. Constraints: 1 <= haystack.length, needle.length <= 104 ...
链接:https://leetcode.cn/problems/find-the-index-of-the-first-occurrence-in-a-string 著作权归领扣网络所有。商业转载请联系官方授权,非商业转载请注明出处。 题意是给定一个 haystack 字符串和一个 needle 字符串,在 haystack 字符串中找出 needle 字符串出现的第一个位置 (从0开始)。如果不存在,则返回...