61 lines
1.4 KiB
C++
61 lines
1.4 KiB
C++
#include<cstdio>
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#include<cstring>
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#include<string>
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#include<queue>
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#include<iostream>
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#include<algorithm>
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using namespace std;
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const int INF=1000100000;
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struct node
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{
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int x,y;
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}n[1010];
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bool cmp(node a,node b)
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{
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return a.x<b.x;
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}
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int main()
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{
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int p,r,xmax,xmin,ymax,ymin,y[1010];
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while(scanf("%d%d",&p,&r)!=EOF)
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{
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ymax=xmax=-INF;ymin=xmin=INF;
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for(int i=0;i<p;i++)
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{
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scanf("%d%d",&n[i].x,&n[i].y);
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if(ymax<n[i].y)ymax=n[i].y;
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if(ymin>n[i].y)ymin=n[i].y;
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if(xmax<n[i].x)xmax=n[i].x;
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if(xmin>n[i].x)xmin=n[i].x;
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}
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if((ymax-ymin<=r)&&(xmax-xmin<=r))
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{
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printf("%d\n",p);
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continue;
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}
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else
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{
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sort(n,n+p,cmp);
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int ans=0;
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for(int i=0;i<p;i++)
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{
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int k=0;
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for(int j=i;n[j].x<=n[i].x+r&&j<p;j++)
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{
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y[k++]=n[j].y;
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}
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sort(y,y+k);
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int count=0,tem=0;
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for(int j=0;j<k&&tem<k;j++)
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{
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while(y[tem]-y[j]<=r&&tem<k)tem++;
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if(count<tem-j)count=tem-j;
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}
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if(ans<count)ans=count;
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}
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printf("%d\n",ans);
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}
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}
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return 0;
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}
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