#include<iostream>
using namespace std;
typedef long long ll;
int main()
{
ll r,y,g;
cin>>r>>y>>g;
ll n;
cin>>n;
ll sum=0;
ll k,t;
for(int i=0;i<n;i++)
{
cin>>k>>t;
if(k==2)
{
sum+=(t+30);
}
else if(k!=3)
{
sum+=t;
}
}
cout<<sum<<endl;
return 0;
}
/*
30 3 30
8
0 10
1 5
0 11
2 2
0 6
0 3
3 10
0 3
*/