#pragma GCC optimize("O3")
#pragma GCC optimize("unroll-loops")
#pragma GCC target("avx2")
#include "quality.h"
#include <bits/stdc++.h>
using namespace std;
int cum[3001][3001];
int sum(int a,int b,int c,int d){
int ans=cum[c][d];
if(a)ans-=cum[a-1][d];
if(b)ans-=cum[c][b-1];
if(a && b)ans+=cum[a-1][b-1];
return ans;
}
int rectangle(int R, int C, int H, int W, int Q[3001][3001]) {
int l=1,r=R*C,cons=(H*W)/2,ans=-1;
while(l<=r){
int med=(l+r)>>1;
for (int i = 0; i < R; ++i)
for (int j = 0; j < C; ++j)
{
cum[i][j]=(Q[i][j]<=med);
if(i)cum[i][j]+=cum[i-1][j];
if(j)cum[i][j]+=cum[i][j-1];
if(i&&j)cum[i][j]-=cum[i-1][j-1];
}
bool f=0;
for (int i = 0; i+H-1 < R; ++i)
{
for (int j = 0; j+W-1 < C; ++j)
if(sum(i,j,i+H-1,j+W-1)>(cons)){
f=1;break;
}
if(f)break;
}
if(f)r=med-1,ans=med;
else l=med+1;
}
assert(ans!=-1);
return ans;
}
