Submission #1106811

#	Time	Username	Problem	Language	Result	Execution time	Memory
1106811		stdfloat	Bomb (IZhO17_bomb)	C++17	15 / 100	1095 ms	8036 KiB

bomb

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

using ll = long long;

int main() {
	ios::sync_with_stdio(false); cin.tie(nullptr);

	int n, m;
	cin >> n >> m;

	vector<string> a(n);
	for (auto &i : a)
		cin >> i;

	int mn1 = n, mn2 = m;
	for (int i = 0; i < n; i++) {
		for (int j = 0; j < m; j++) {
			if (a[i][j] == '0') continue;

			int l = i, r = i;
			while (0 < l && a[l - 1][j] == '1') l--;
			while (r + 1 < n && a[r + 1][j] == '1') r++;
			mn1 = min(mn1, r - l + 1);

			l = r = j;
			while (0 < l && a[i][l - 1] == '1') l--;
			while (r + 1 < m && a[i][r + 1] == '1') r++;
			mn2 = min(mn2, r - l + 1);
		}
	}

	bool ok = true;
	vector<vector<bool>> vis(n, vector<bool>(m));
	for (int i = 0; i + mn1 <= n; i++) {
		for (int j = 0; j + mn2 <= m; j++) {
			if (a[i][j] == '0') continue;

			bool tr = true;
			for (int k = i; k < i + mn1 && tr; k++) {
				for (int l = j; l < j + mn2 && tr; l++)
					tr = (a[k][l] == '1');
			}

			ok = vis[i][j];
			if (!tr) continue;

			for (int k = i; k < i + mn1; k++) {
				for (int l = j; l < j + mn2; l++)
					vis[k][l] = true;
			}

			ok = vis[i][j];
		}
	}

	assert(ok);

	cout << mn1 * mn2;
}

• Subtask 1: 15 / 100