Restaurant Tables.cpp

#include <iostream>

using namespace std;

int main() {

    long n, a, b, c = 0, unserved = 0;
    cin >> n >> a >> b;
    long group[n];
    for (int i = 0; i < n; i++) {
        cin >> group[i];
        if (group[i] == 1) {
            if (a > 0)
                a--;
            else if (b > 0 && c == 0) {
                c++;
                b--;
            }
            else if (c > 0)
                c--;
            else
                unserved += 1;
        }
        else if (group[i] == 2) {
            if (b == 0)
                unserved += 2;
            else
                b--;
        }
    }
    cout << unserved;

    return 0;
}