#include <bits/stdc++.h>
using namespace std;
bool check(int n, int m, int h, int w, int ms[3001][3001], int mid) {
vector<vector<int>> cnt(n + 1, vector<int>(m + 1));
for (int i = 1; i <= n; ++i)
for (int j = 1; j <= m; ++j) {
int val = ms[i-1][j-1] <= mid;
cnt[i][j] = cnt[i][j-1] + cnt[i-1][j] - cnt[i-1][j-1] + val;
}
for (int i = h; i <= n; ++i)
for (int j = w; j <= m; ++j)
if (cnt[i][j] - cnt[i - h][j] - cnt[i][j - w] + cnt[i - h][j - w] > h*w/2) return true;
return false;
}
int rectangle(int n, int m, int h, int w, int ms[3001][3001]) {
int l = 1, r = n*m;
while (l < r) {
int mid = (l + r)/2;
if (check(n, m, h, w, ms, mid)) r = mid;
else l = mid + 1;
}
return l;
}
