#include <bits/stdc++.h>

using namespace std;

int main(){
    int n;
    int i, j;
        int lati[n];
        int longi[n];
        int heig[n];
        int poin[n];
    int x;
    int y;
    cin >> n >> x >> y;
    float a[n][n];
    float sum=0;
    for(int a0 = 0; a0 < n; a0++){
        int latitude;
        int longitude;
        int height;
        int points;
       
        cin >> latitude >> longitude >> height >> points;
        // your code goes here
        lati[a0]=latitude;
        longi[a0]=longitude;
        heig[a0]=height;
        poin[a0]=points;
    }
    for(i=0;i<n;i++)
        {
        for(j=0;j<n;j++)
            {
            if(abs(lati[i]-lati[j])<=x&&abs(longi[i]-longi[j])<=y&&i!=j)
                {
                a[i][j]=poin[i]+poin[j];
            }
            else a[i][j]=0;
           // cout<<a[i][j]<<" ";
            sum=sum+a[i][j];
            //cout<<sum<<" ";
        }
    }
    sum=sum/2;
    for(i=0;i<n;i++)
        {
        for(j=0;j<n;j++)
            {
            if(i==j)
                {
                sum=sum+a[i][j]/2;
            }
        }
    }
    cout<<sum+1;
    return 0;
}