#include <bits/stdc++.h>

using namespace std;

int main(){
    int n;
    int x;
    int y;
    int a[100][100];
    cin >> n >> x >> y;
    for(int a0 = 0; a0 < n; a0++){
        int latitude;
        int longitude;
        int height;
        int points;
        cin >> latitude >> longitude >> height >> points;
         a[a0][0]=latitude;
        a[a0][1]=longitude;
        a[a0][2]=height;
        a[a0][3]=points;
    }
    int sum=0;
    for(int i=0;i<n;i++)
        {
        for(int j=0;j<n;j++)
            {
            if(a[i][0]-a[i+j][0]<=x && a[i][1]-a[i+j][1]<=y)
                sum+=a[i][3];
        }
    }
    cout<<sum/2;
    return 0;
}