ianadiwibowo/central-park

package main

import (
    "fmt"
    "strconv"
)

// 7. Reverse Integer (Medium)
// https://leetcode.com/problems/reverse-integer/

func reverse(x int) int {
    MAX_VALUE := 2147483647
    MIN_VALUE := -2147483648

    number := reverseString(fmt.Sprint(x))

    if string(number[len(number)-1]) == "-" {
        number = "-" + number[:len(number)-1]
    }

    result, err := strconv.Atoi(number)
    if err != nil || result > MAX_VALUE || result < MIN_VALUE {
        return 0
    }

    return result
}

func reverseString(s string) string {
    result := ""
    for _, c := range s {
        result = string(c) + result
    }
    return result
}