#53932: 數學解
s211378@stu.tcssh.tc.edu.tw
(221_20黃暐宸)
#include <iostream>
using namespace std;
int main() {
int a, b = 0;
cin >> a;
while(a > 0){
b=b*10 + a%10;
a = a/10;
}
cout << b;
return 0;
}