# -*- coding: gbk -*-
from __future__ import print_function
def reverse_num(num):
print('输出:', end='')
if (num < 0):
print('-', end='')
num = -num;
print_zero = False
while num > 0:
if print_zero == True:
print(num % 10, end='')
elif num % 10 != 0:
print_zero = True
print(num % 10, end='')
num /= 10
print()
if __name__ == '__main__':
num = int(raw_input('输入'))
reverse_num(num)