全ACGO最短题解

#include <bits/stdc++.h>
using namespace std;int main(){long long a,b;int c;cin >> a >> b >> c;if(c == 2){if(a == b) cout << a * 4;else cout << (a + b) * 2;}else if(c == 1){if(a == b) cout << a * a;else cout << a * b;}return 0;}