#include <iostream>
#include <cstdio>
using namespace std;
typedef long long ll;
int main(){
    int r, y, g;    cin >> r >> y >> g;
    int T;  cin >> T;
    ll res = 0;
    while(T -- ){
        ll op, t;  scanf("%lld%lld", &op, &t);
        if(op == 0) res += t;
        else{
            if(op == 1) t = r - t;
            else if(op == 2)    t = r + g + y - t;
            else    t = r + g - t;
            t += res;
            t %= r + g + y;
            if(t < r)   res += r - t;
            else if(t >= r + g)    res += r + g + y - t + r;
        }
    }
    cout << res << endl;
    return 0;
}