Submission #383378

#	Time	Username	Problem	Language	Result	Execution time	Memory
383378		morato	Bitaro’s Party (JOI18_bitaro)	C++17	0 / 100	3 ms	2668 KiB

bitaro

#include <bits/stdc++.h>

using namespace std;

const int MAXN = 1e5 + 5;

vector<int> adj[MAXN];

int mark[MAXN], ans[MAXN], in[MAXN];
int a[2 * MAXN], b[2 * MAXN];

int main(){
	ios::sync_with_stdio(false);
	cin.tie(0);
	int n, m, q;
	cin >> n >> m >> q;
	for (int i = 0; i < m; i++) {
		cin >> a[i] >> b[i];
	}
	int resp = -1;
	vector<int> lista;
	int t, k;
	cin >> t >> k;
	for (int i = 0; i < m; i++) {
		if (a[i] > t || b[i] > t) {
			continue;
		}
		if (a[i] == t) continue;
		adj[b[i]].push_back(a[i]);
		in[a[i]]++;
	}
	for (int i = 0; i < k; i++) {
		int x;
		cin >> x;
		mark[x] = 1;
	}
	lista.push_back(t);
	for (int i = 0; i < (int) lista.size(); i++) {
		int cur = lista[i];
		if (!mark[cur]) resp = max(resp, ans[cur]);
		for (int nxt : adj[cur]) {
			in[nxt]--;
			if (!in[nxt]) {
				lista.push_back(nxt);
				ans[nxt] = ans[cur] + 1;
			}
		}
	}
	cout << resp << '\n';
	return 0; 
}

• Subtask 1: 0 / 7
• Subtask 2: 0 / 7
• Subtask 3: 0 / 86