# 接收输入整数
n = int(input())
# 初始化求和
b = 0
# 逆序输出
while n > 0:
    b = b * 10 + n % 10
    n //= 10
print(b)
/**************************************************************
	Problem: 1121
	User: admin
	Language: Python
	Result: Accepted
	Time:100 ms
	Memory:34244 kb
****************************************************************/