palindrome_index.go

package main

import (
    "bufio"
    "fmt"
    "io"
    "os"
    "strconv"
    "strings"
)

func isPalindrome(s string) bool {
    for i, j := 0, len(s)-1; i < len(s); i, j = i + 1, j - 1 {
        if i >= j {
            break
        }
        if s[i] != s[j] {
            return false
        }
    }
    return true
}

// Complete the palindromeIndex function below.
func palindromeIndex(s string) int32 {
    ii := -1
    jj := -1
    for i, j := 0, len(s)-1; i < len(s); i, j = i + 1, j - 1 {
        if i >= j {
            return -1
        }
        if s[i] != s[j] {
            ii = i
            jj = j
            break
        }
    }
    
    if isPalindrome(s[ii+1: jj+1]) {
        return int32(ii)
    }
    return int32(jj)
}