#include <bits/stdc++.h>

using namespace std;

int main(){
    long long int n;
   long long int x;
    long long int y;
    long long int sum=0;
    cin >> n >> x >> y;
    for(int a0 = 0; a0 < n; a0++){
        int latitude;
        int longitude;
        int height;
        int points;
        cin >> latitude >> longitude >> height >> points;
        sum+=points;
    }
    cout<<sum;
    return 0;
}