문제
풀이
#include <iostream>
using namespace std;
void solve(void) {
int a, b; cin >> a >> b;
int c, d; cin >> c >> d;
cout << (a + b + c + d - 2) % 4 + 1;
}
int main(void) {
ios::sync_with_stdio(false);
cin.tie(nullptr);
solve();
return 0;
}