#include <iostream>
using namespace std;
int main() {
int a, b;
cin >> a >> b;
b=a%10;
cout << b;
return 0;
}
I2luY2x1ZGUgPGlvc3RyZWFtPgp1c2luZyBuYW1lc3BhY2Ugc3RkOwoKaW50IG1haW4oKSB7CglpbnQgYSwgYjsKICAgIGNpbiA+PiBhID4+IGI7CiAgICBiPWElMTA7CiAgICBjb3V0IDw8IGI7ICAKCglyZXR1cm4gMDsKfQ==