Submission #1048922

#	Time	Username	Problem	Language	Result	Execution time	Memory
1048922		EntityPlantt	Light Bulbs (EGOI24_lightbulbs)	C++17	76.87 / 100	117 ms	1304 KiB

Main

#include <iostream>
#include <vector>
using namespace std;
typedef vector <vector <bool>> matrix;

int n;
vector <string> rot;

/*
0 = intersect
1 = same
2 = parallel
*/

inline const matrix cm(vector <pair <int, int>> lamps = {}) {
	matrix m(n, vector<bool>(n, false));
	for (auto &p : lamps) m[p.first][p.second] = true;
	return m;
}
short ask(short x1, short y1, short x2, short y2) {
	cout << '?';
	for (auto &i : cm({{x1, y1}, {x2, y2}})) {
		cout << '\n';
		for (bool &&j : i) cout << j;
	}
	cout << endl;
	int x;
	cin >> x;
	if (x == 2 * n) return 2;
	if (x == n) return 1;
	return 0;
}
void answer(const matrix &m) {
	cout << '!';
	for (auto &i : m) {
		cout << '\n';
		for (bool &&j : i) cout << j;
	}
	exit(0);
}
char rotof(short x, short y) {
	if (rot[x][y] == '.') {
		for (int i = 0; i < n; i++) {
			if (rot[x][i] != '.') {
				if (ask(x, i, x, y)) return rot[x][y] = rot[x][i];
				return rot[x][y] = rot[x][i] == 'V' ? 'H' : 'V';
			}
			if (rot[i][y] != '.') {
				if (ask(i, y, x, y)) return rot[x][y] = rot[i][y];
				return rot[x][y] = rot[i][y] == 'V' ? 'H' : 'V';
			}
		}
	}
	return rot[x][y];
}
void ansvert() {
	matrix m = cm();
	for (int i = 0; i < n; i++) {
		for (int j = 0; j < n; j++) {
			if (rot[j][i] == 'V') {
				m[j][i] = true;
				break;
			}
		}
	}
	answer(m);
}
void anshor() {
	matrix m = cm();
	for (int i = 0; i < n; i++) {
		for (int j = 0; j < n; j++) {
			if (rot[i][j] == 'H') {
				m[i][j] = true;
				break;
			}
		}
	}
	answer(m);
}

signed main() {
	cin >> n;
	rot = vector(n, string(n, '.'));
	short ans = ask(0, 0, 0, 1);
	if (ans == 2) rot[0][0] = rot[0][1] = 'V';
	else if (ans == 1) rot[0][0] = rot[0][1] = 'H';
	else {
		ans = ask(0, 0, 0, 2);
		if (ans == 2) {
			rot[0][1] = 'H';
			rot[0][0] = rot[0][2] = 'V';
		}
		else if (ans == 1) {
			rot[0][1] = 'V';
			rot[0][0] = rot[0][2] = 'H';
		}
		else if (ask(0, 1, 0, 2) == 2) {
			rot[0][0] = 'H';
			rot[0][1] = rot[0][2] = 'V';
		}
		else {
			rot[0][0] = 'V';
			rot[0][1] = rot[0][2] = 'H';
		}
	}
	for (int i = 0, j = 1; i < n; i++) {
		if (rotof(0, i) == 'H') {
			while (j < n && rotof(j, i) == 'H') j++;
			if (j == n) anshor();
		}
	}
	ansvert();
}

• Subtask 1: 11 / 11
• Subtask 2: 11 / 11
• Subtask 3: 54.8744444444 / 78