Submission #825805

#	Time	Username	Problem	Language	Result	Execution time	Memory
825805		pawned	Rectangles (IOI19_rect)	C++17	37 / 100	5055 ms	40460 KiB

rect

#include <bits/stdc++.h>
using namespace std;

#define fi first
#define se second
#define pb push_back
typedef long long ll;
typedef pair<int, int> ii;
typedef vector<int> vi;

#include "rect.h"

int N, M;
int grid[2505][2505];

bool check(int x0, int x1, int y0, int y1) {
	for (int i = x0; i <= x1; i++) {
		for (int j = y0; j <= y1; j++) {
			int h0 = grid[i][j];
			int h1 = grid[i][y0 - 1];
			int h2 = grid[i][y1 + 1];
			int h3 = grid[x0 - 1][j];
			int h4 = grid[x1 + 1][j];
			if (h0 >= h1 || h0 >= h2 || h0 >= h3 || h0 >= h4)
				return false;
		}
	}
	return true;
}

ll count_rectangles(vector<vi> a) {
	N = a.size();
	M = a[0].size();
	for (int i = 0; i < N; i++) {
		for (int j = 0; j < M; j++) {
			grid[i][j] = a[i][j];
		}
	}
	int total = 0;
	for (int x0 = 1; x0 <= N - 2; x0++) {
		for (int x1 = x0; x1 <= N - 2; x1++) {
			for (int y0 = 1; y0 <= M - 2; y0++) {
				for (int y1 = y0; y1 <= M - 2; y1++) {
					if (check(x0, x1, y0, y1))
						total++;
				}
			}
		}
	}
	return total;
}

• Subtask 1: 8 / 8
• Subtask 2: 7 / 7
• Subtask 3: 12 / 12
• Subtask 4: 0 / 22
• Subtask 5: 10 / 10
• Subtask 6: 0 / 13
• Subtask 7: 0 / 28