Reverse a Number

Write the decimal digits of n in reverse order and return the resulting number. Zeros that end up at the front disappear, so 1200 becomes 21.

Implement reverse_number(n).

Input

n: A positive integer.

Output

Return the reversed number.

Vincoli

1 ≤ n ≤ 10¹⁸. The reversed value always fits a signed 64-bit integer.

Esempi

Input:
n = 352

Output atteso:
expected = 253

Input:
long long n = 352;

Output atteso:
long long expected = 253;

Input:
long n = 352;

Output atteso:
long expected = 253;

Input:
n = 1200

Output atteso:
expected = 21

Input:
long long n = 1200;

Output atteso:
long long expected = 21;

Input:
long n = 1200;

Output atteso:
long expected = 21;