#include <bits/stdc++.h>

using namespace std;

int main() {
    /* Enter your code here. Read input from STDIN. Print output to STDOUT */   
    int n,x,y;
    cin>>n>>x>>y;

    int qqewareafaffafaf[n][4];
    int sum=0;
    for(int i=0;i<n;i++)
        {
            cin>>qqewareafaffafaf[i][0]>>qqewareafaffafaf[i][1]>>qqewareafaffafaf[i][2]>>qqewareafaffafaf[i][3];
    }
    

int qqffffff=qqewareafaffafaf[0][3];
   

 for(int i=1;i<n;i++)
       

 {
          

  if((abs(qqewareafaffafaf[i][0]-qqewareafaffafaf[i-1][0])!=x ||abs(qqewareafaffafaf[i][1]-qqewareafaffafaf[i-1][1])!=y|| qqewareafaffafaf[i][2]-qqewareafaffafaf[i-1][2]<0))
             

   {
               

 sum=max(qqffffff,sum);
              

  qqffffff=0;
               
 continue;
            
}
            
qqffffff+=qqewareafaffafaf[i][3];
  
  }
  
  sum=max(sum,qqffffff);
   
 cout<<sum;
    
    return 0;
}
}