#include "quality.h"
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ld long double
#define endl '\n'
#define fi first
#define se second
#define pb push_back
#define FOR(i,l,r) for(ll i=(l),_r=(r);i<=_r;i++)
#define FORNG(i,r,l) for(ll i=(r),_l=(l);i>=_l;i--)
#define MASK(i) (1LL<<(i))
#define BIT(x,i) (((x)>>(i))&1LL)
#define all(v) (v).begin(),(v).end()
#define sz(v) ((ll)(v).size())
const ll MOD = 1e9+7, N = 3001;
ll n,m,w,h,a[N][N],ans;
ll b[N][N];
bool check(ll x){
FOR(i,1,n)FOR(j,1,m){
b[i][j] = b[i][j-1] + b[i-1][j] - b[i-1][j-1] + (a[i][j]<=x?+1:-1);
if(i>=w && j >= h){
ll s = b[i][j] - b[i][j-h] - b[i-w][j] + b[i-w][j-h];
if(s>=0)return 1;
}
}
return 0;
}
ll solve(){
ll l = 1, r = n*m;
while(l <= r){
ll mid = (l + r) >> 1;
if(check(mid)){
r = mid - 1;
ans = mid;
}else l = mid + 1;
}
return ans;
}
int rectangle(int R, int C, int H, int W, int Q[3001][3001]) {
n = R, m = C, w = H, h = W;
FOR(i,1,n)FOR(j,1,m)a[i][j] = Q[i - 1][j - 1];
return solve();
}
//
//int main(){
// int R,C,H,W,Q[3001][3001],i,j,ans;
// scanf("%d%d%d%d",&R,&C,&H,&W);
// for (i=0;i<R;i++) for (j=0;j<C;j++) scanf("%d",&Q[i][j]);
// ans = rectangle(R,C,H,W,Q);
// printf("%d\n",ans);
// return 0;
//}
