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package main
import "fmt"
func reverse(x int) int {
var res int
var negative bool
if x < 0 {
negative = true
x = x * -1
}
for x > 0 {
digit := x - ((x / 10) * 10)
res = res*10 + digit
if res > (0x1 << 31) {
return 0
}
x = x / 10
}
if negative {
return res * -1
}
return res
}
func main() {
fmt.Println(reverse(123))
fmt.Println(reverse(-123))
fmt.Println(reverse(120))
fmt.Println(reverse(1534236469))
}
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