Submission #726584

#	Time	Username	Problem	Language	Result	Execution time	Memory
726584		horiseun	Quality Of Living (IOI10_quality)	C++14	100 / 100	2165 ms	175400 KiB

quality

#include <iostream>
#include <vector>
#include <tuple>
#include <queue>
#include <stack>
#include <deque>
#include <set>
#include <map>
#include <cmath>
#include <random>
#include <string>
#include <cassert>
#include <climits>
#include <algorithm>
#include <unordered_set>
#include <unordered_map>
#include "quality.h"
using namespace std;

#define ll long long
#define f first
#define s second

int r, c, h, w, q[3001][3001], pref[3001][3001];

bool possible(int x) {
	fill(&pref[0][0], &pref[0][0] + sizeof(pref) / sizeof(pref[0][0]), 0);
	for (int i = 1; i <= r; i++) {
		for (int j = 1; j <= c; j++) {
			if (q[i][j] == x) {
			} else if (q[i][j] > x) pref[i][j] = -1;
			else pref[i][j] = 1;
			pref[i][j] += pref[i - 1][j];
			pref[i][j] += pref[i][j - 1];
			pref[i][j] -= pref[i - 1][j - 1];
		}
	}
	for (int i = h; i <= r; i++) {
		for (int j = w; j <= c; j++) {
			if (pref[i][j] - pref[i - h][j] - pref[i][j - w] + pref[i - h][j - w] >= 0) return true;
		}
	}
	return false;
}

int rectangle(int R, int C, int H, int W, int Q[3001][3001]) {
	r = R, c = C, h = H, w = W;
	for (int i = 1; i <= R; i++) for (int j = 1; j <= C; j++) q[i][j] = Q[i - 1][j - 1];
	int lft = 1, rht = R * C, ret = R * C;
	while (lft <= rht) {
		int mid = (lft + rht) / 2;
		if (possible(mid)) {
			rht = mid - 1;
			ret = mid;
		} else lft = mid + 1;
	}
	return ret;
}

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