Reverse Integer

Problem

Reverse the digits of a signed 32-bit integer and return the result, or 0 if the reversed value would overflow beyond the range from minus 2 to the 31st power through 2 to the 31st power minus 1.

Reverse the absolute value digit by digit and reapply the sign. Trailing zeros become leading zeros and disappear.

Hint

Check the final reversed value against the 32-bit bounds after applying the sign.

Test cases

case 1

in: [123]

expected: 321

case 2

in: [-123]

expected: -321

case 3

in: [120]

expected: 21

case 4

in: [0]

expected: 0

case 5

in: [1534236469]

expected: 0

Starter codePython

def reverse_integer(x):
    # Your code here
    pass

5 test cases · run your code against them in the editor