【题解】CCF CSP 201812-1 —— 小明上学

#include <iostream>

using namespace std;

int main()
{
    int r, y, g;
    int n;
    cin >> r >> y >> g;
    cin >> n;
    int sum_time = 0;
    for(int i = 0; i < n; i++) {
        int k, t;
        cin >> k >> t;
        if(k == 0)  sum_time += t;
        else if(k == 1) sum_time += t;
        else if(k == 2) sum_time += (t + r);
    }
    cout << sum_time;
    return 0;
}