leetcode-go/medium/5.go

package main

import (
	"fmt"
)

func longestPalindrome(s string) string {
	n := len(s)
	if n < 2 {
		return s
	}
	maxBeg, maxEnd := 0, -1
	// 暴力穷举
	for beg := 0; beg < n; beg++ {
		for end := beg; end < n; end++ {
			i := 0
			for ; end-beg > maxEnd-maxBeg && i <= end-beg; i++ {
				if s[beg+i] != s[end-i] {
					break
				}
			}
			if i == end-beg+1 {
				maxBeg = beg
				maxEnd = end
			}
		}
	}
	return s[maxBeg : maxEnd+1]
}

func main() {
	fmt.Println(longestPalindrome("ASDFDSAASBUGAYFUYFSDG"))
	fmt.Println(longestPalindrome("A"))
	fmt.Println(longestPalindrome(""))
	fmt.Println(longestPalindrome("gigiudhfafhsaoifhoifaochasiofueosanfklf"))
}