Submission #831261

#	Time	Username	Problem	Language	Result	Execution time	Memory
831261		pavement	Cell Automaton (JOI23_cell)	C++17	16 / 100	2485 ms	511324 KiB

cell

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

using ii = pair<int, int>;

const int D = 2000;

int N, Q, X[100005], Y[100005], dist[4 * D + 5][4 * D + 5], dr[] = {-1, -1, -1, 0, 0, 1, 1, 1}, dc[] = {-1, 0, 1, -1, 1, -1, 0, 1}, ans[4000005];
queue<ii> qu;

int main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	cin >> N >> Q;
	for (int i = 1; i <= N; i++) {
		cin >> X[i] >> Y[i];
		int p = X[i] + Y[i], q = X[i] - Y[i];
		X[i] = p;
		Y[i] = q;
		X[i] += 2 * D;
		Y[i] += 2 * D;
	}
	for (int i = 0; i <= 4 * D; i++) {
		for (int j = 0; j <= 4 * D; j++) {
			dist[i][j] = (int)1e9;
		}
	}
	for (int i = 1; i <= N; i++) {
		dist[X[i]][Y[i]] = 0;
		qu.emplace(X[i], Y[i]);
	}
	while (!qu.empty()) {
		auto [r, c] = qu.front();
		qu.pop();
		for (int k = 0; k < 8; k++) {
			int nr = r + dr[k], nc = c + dc[k];
			if (0 <= nr && nr <= 4 * D && 0 <= nc && nc <= 4 * D) {
				if (dist[nr][nc] > dist[r][c] + 1) {
					dist[nr][nc] = dist[r][c] + 1;
					qu.emplace(nr, nc);
				}
			}
		}
	}
	for (int i = 0; i <= 4 * D; i++) {
		for (int j = 0; j <= 4 * D; j++) {
			if ((i + j) % 2 == 0) {
				ans[dist[i][j]]++;
			}
		}
	}
	for (int i = 1, t; i <= Q; i++) {
		cin >> t;
		cout << ans[t] << '\n';
	}
}

• Subtask 1: 4 / 4
• Subtask 2: 12 / 12
• Subtask 3: 0 / 8
• Subtask 4: 0 / 8
• Subtask 5: 0 / 17
• Subtask 6: 0 / 25
• Subtask 7: 0 / 26