https://www.acmicpc.net/problem/10430
#include <iostream>
using namespace std;
int a, b, c;
int main() {
cin >> a >> b >> c;
cout << (a + b) % c << endl;
cout << ((a % c) + (b % c)) % c << endl;
cout << (a * b) % c << endl;
cout << ((a % c) * (b % c)) % c;
return 0;
}