Submission #958108

#	Time	Username	Problem	Language	Result	Execution time	Memory
958108		pedroslrey	Quality Of Living (IOI10_quality)	C++17	100 / 100	1735 ms	71436 KiB

quality

#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;
}

• Subtask 1: 20 / 20
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 20 / 20
• Subtask 5: 20 / 20