import math


# Top Solution
class Solution:
    def reverse(self, x: int) -> int:
        MAX_INT = 2**31 - 1  # 2,147,483,647
        MIN_INT = -(2**31)  # -2,147,483,648
        reverse = 0

        while x != 0:
            if reverse > MAX_INT / 10 or reverse < MIN_INT / 10:
                return 0
            digit = x % 10 if x > 0 else x % -10
            reverse = reverse * 10 + digit
            x = math.trunc(x / 10)

        return reverse


# Some other Solution
class SolutionTwo:
    def reverse(self, x: int) -> int:
        flag = -1 if x < 0 else 1

        s = str(abs(x))
        x = int(s[::-1])

        return x * flag if x < 2**31 else 0


class SolutionThree:
    def reverse(self, x: int) -> int:
        max_int = pow(2, 31) - 1
        min_int = pow(-2, 31)

        flag = -1 if x < 0 else 1
        ans = 0
        x = abs(x)

        while x > 0:
            digit = x % 10
            if ans > max_int / 10:
                return 0
            ans = (ans * 10) + digit
            x //= 10

        return ans * flag