04 May 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
Example 4:
Input: x = 0 Output: 0
Constraints:
-231 <= x <= 231 - 1
Python 3
class Solution:
def reverse(self, x: int) -> int:
result =0
isPositive = True
if(x<0):
isPositive=False
x=-x
while (x>0):
remainder = x % 10
result = result*10+remainder
x = x//10
if(result> pow(2,31)):
return 0
if(isPositive==False):
result = -result
return result
No Comments