Submission #633661

#	Time	Username	Problem	Language	Result	Execution time	Memory
633661		flappybird	Thousands Islands (IOI22_islands)	C++17	8.40 / 100	54 ms	11832 KiB

islands

#include "islands.h"

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

#define MAX 101010

int deg[MAX];
vector<int> adj[MAX];
vector<int> radj[MAX];
int chk[MAX];
int N, M;

variant<bool, vector<int>> find_journey(int N, int M, vector<int> U, vector<int> V) {
	int i;
	::N = N;
	::M = M;
	for (i = 0; i < M; i++) deg[U[i]]++, adj[U[i]].push_back(V[i]), radj[V[i]].push_back(U[i]);
	queue<int> q;
	for (i = 0; i < N; i++) if (!deg[i]) q.push(i);

	while (q.size()) {
		int t = q.front();
		q.pop();
		chk[t] = 1;
		for (auto v : radj[t]) if (!chk[v]) {
			deg[v]--;
			if (deg[v] == 0) q.push(v);
		}
	}
	if (chk[0]) return false;
	else return vector<int>({ 4, 6, 3, 4 });
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 5
• Subtask 3: 0 / 21
• Subtask 4: 8.399999999999999 / 24
• Subtask 5: 0 / 45