POJ 2029

#include<iostream>#include<vector>#include<algorithm>#include<string>#include<iterator>#include<cstring>using namespace std;#define _size 510bool map[_size][_size];int W,H;int getcount(int x,int y,int w,int h){int count=0;for(int i=x;i<x+w;i++){for(int j=y;j<y+h;j++)if(map[i][j])++count;}return count;}int main(){freopen("1.txt","r",stdin);int n,x,y,w,h;while(cin>>n&&n){cin>>W>>H;memset(map,0,sizeof(map));for(int i=0;i<n;i++){cin>>x>>y;map[x-1][y-1]=1;}cin>>w>>h;int max1=0;for(int i=0;i<=W-w;i++){for(int j=0;j<=H-h;j++){max1=max(max1,getcount(i,j,w,h));}}cout<<max1<<endl;}}