#include <bits/stdc++.h>
using namespace std;
long long r,y,g;
long long n; 
char flag;
long long t;
long long tim = 0;
vector<char> v;
int main(){
	//ifstream in;
	//in.open("ryg.txt");
	ios::sync_with_stdio(false);
	cin.tie(0);
	cin >> r >> y >> g;
	int sum = r + y + g;
	cin >> n;
	while(n--){
		cin >> flag >> t;
		int temp = 0; 
		switch(flag){
			case '0':
				tim+=t;
				break;
			case '1':
				temp = (t - tim )%(r+y+g);
				while(temp < 0) temp += (r+y+g);
				if(temp <= r + y) tim += temp;
				break;
			case '2':
				t += r;
				temp = (t - tim )%(r+y+g);
				while(temp < 0) temp += (r+y+g);
				if(temp <= r+y) tim += temp;
				break;
			default:
				t += r + y;
				temp = (t - tim )%(r+y+g);
				while(temp < 0) temp += (r+y+g);
				if(temp <= r+y) tim += temp;
								
		}
	
	}
	cout << tim;
}