#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
using namespace std;


int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */  
    ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
    long long int n,x,y,la,lo,h,pt,sum=0;
    cin>>n>>x>>y;
    while(n--)
        {
        cin>>la>>lo>>h>>pt;
        sum+=pt;
    }
    cout<<sum;
    return 0;
}