#include <bits/stdc++.h>
using namespace std;

int main()
{
    //clock_t tstart = clock();
    //freopen("input.txt", "r", stdin);
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);

    long long int n,x,y, tot=0;
    cin>>n>>x>>y;
    long long int la[n],lo[n],he[n], po[n];
    for(int i=0; i<n; i++)
    {
    	cin>>la[i]>>lo[i]>>he[i]>>po[i];
    }

    for(int i=0; i<n; i++)
    	tot+=po[i];
    cout<<tot<<endl;

    //cout<<"\nTotal Time Taken : "<<(double)(-tstart + clock())/CLOCKS_PER_SEC<<"sec\n";
    return 0;
}