#include "quality.h"
#include <bits/stdc++.h>
using namespace std;
const int MX = 3001;
bool ok(int level, int R, int C, int r, int c, int Q[MX][MX]) {
int sum[MX][MX];
for (int i = 1; i <= R; i++) for (int j = 1; j <= C; j++)
sum[i][j] = sum[i][j - 1] + sum[i - 1][j] - sum[i - 1][j - 1] + (Q[i][j] > level ? -1 : 1);
for (int i = 1; i + r - 1 <= R; i++) for (int j = 1; j + c - 1 <= C; j++)
if (sum[i + r - 1][j + c - 1] - sum[i - 1][j + c - 1] - sum[i + r - 1][j - 1] + sum[i - 1][j - 1] > 0) return true;
return false;
}
int rectangle(int R, int C, int H, int W, int Q[MX][MX]) {
int lo = 1, hi = R * C, res = 1;
while (lo <= hi) {
int mid = lo + (hi - lo) / 2;
if (ok(mid, R, C, H, W, Q)) { res = mid; hi = mid - 1; }
else lo = mid + 1;
}
return res;
}
