This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <stdio.h>
#include <algorithm>
using namespace std;
pair <int,int> a[101];
int n, l, m, y[101], x[101], ans;
void input(void)
{
int i;
scanf("%d %d %d",&n,&l,&m);
l/=2;
for(i=1 ; i<=m ; i++)
{
scanf("%d %d",&y[i],&x[i]);
a[i]=make_pair(y[i],x[i]);
}
sort(y+1,y+m+1);
sort(x+1,x+m+1);
}
void process(void)
{
int i, j, k, o, p, cnt;
for(i=1 ; i<=m ; i++)
for(j=1 ; j<=m ; j++)
for(k=1 ; k<=l-1 ; k++)
{
o=l-k;
cnt=0;
for(p=1 ; p<=m ; p++)
{
if((y[i]<=a[p].first && a[p].first<=y[i]+k) && (x[j]<=a[p].second && a[p].second<=x[j]+o))
cnt++;
}
if(ans<cnt)
ans=cnt;
}
}
void output(void)
{
printf("%d",ans);
}
int main(void)
{
input();
process();
output();
return 0;
}
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