reverse-integer.go

// https://leetcode-cn.com/problems/reverse-integer/

package main

import (
	"fmt"
	"math"
)

func reverse(x int) int {
	rev := 0
	for x != 0 {
		pop := x % 10
		x /= 10
		if rev > math.MaxInt32/10 || (rev == math.MaxInt32/10 && pop > 7) {
			return 0
		}
		if rev < math.MinInt32/10 || (rev == math.MinInt32/10 && pop < -8) {
			return 0
		}
		rev = rev*10 + pop
	}
	return rev
}

func main() {
	fmt.Println(reverse(7463847412))
}