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Submission #197742

# Submission time Handle Problem Language Result Execution time Memory
197742 2020-01-22T18:17:16 Z Minnakhmetov Rectangles (IOI19_rect) C++14
0 / 100
 2 ms 376 KB 
#include "rect.h"
#include <bits/stdc++.h>
using namespace std;

#define ll long long

const int N = 2505;
int dx[4] = {-1, 1, 0, 0},
	dy[4] = {0, 0, -1, 1};
bool used[N][N];
int mn_x, mx_x, mn_y, mx_y, ct, n, m;

void dfs(vector<vector<int>> &a, int x, int y) {
	used[x][y] = 1;
	ct++;

	mn_x = min(mn_x, x);
	mx_x = max(mx_x, x);
	mn_y = min(mn_y, y);
	mx_y = max(mx_y, y);

	for (int i = 0; i < 4; i++) {
		int p = x + dx[i],
			q = y + dy[i];
		if (p >= 0 && p < n && q >= 0 && q < m && 
			a[p][q] == 0 && !used[p][q]) {
			dfs(a, p, q);
		}
	}
}

ll solve01(vector<vector<int>> a) {
	n = a.size(),
		m = a[0].size();

	ll ans = 0;

	for (int i = 0; i < n; i++) {
		for (int j = 0; j < m; j++) {
			if (!used[i][j] && a[i][j] == 0) {
				mn_x = N, mx_x = -1, mn_y = N, mx_y = -1, ct = 0;
				dfs(a, i, j);
				if (mn_x > 0 && mx_x < n &&
					mn_y > 0 && mx_y < m &&
					ct == (mx_x - mn_x + 1) * (mx_y - mn_y + 1))
					ans++;
			}
		}
	}

	return ans;
}

ll count_rectangles(vector<vector<int>> a) {
	return solve01(a);
}

Subtask #1
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 376 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 7.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 376 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 12.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 376 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 22.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 376 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 376 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 376 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 28.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 376 KB Output isn't correct
2 Halted 0 ms 0 KB -