7. Reverse Integer

7. Reverse Integer

Given a signed 32-bit integer x, return x with its digits reversed. If reversing x causes the value to go outside the signed 32-bit integer range [-231, 231 - 1], then return 0.

Assume the environment does not allow you to store 64-bit integers (signed or unsigned).

Example 1:

Input: x = 123
Output: 321

Example 2:

Input: x = -123
Output: -321

Example 3:

Input: x = 120
Output: 21

Constraints:

  • -231 <= x <= 231 - 1

 

class Solution:
    def reverse(self, x: int) -> int:
        y = 0
        is_nagative= False
        if x<0:
            is_nagative = True
            x = -x
        while x > 0:
            y = x % 10 + y*10
            x = x//10
            print(x)
            print(y)
            print(“—————-“)
        if is_nagative == True:
            y = -y
        if y < -(2**31) or (y > (2**31)-1):
            y = 0
        return y
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