Submission #831177

#	Time	Username	Problem	Language	Result	Execution time	Memory
831177		caganyanmaz	Thousands Islands (IOI22_islands)	C++17	8.40 / 100	29 ms	10236 KiB

islands

#include <bits/stdc++.h>
#define pb push_back
#include "islands.h"

using namespace std;

constexpr static int MXN = 1e5 + 5;
int n, m;
vector<int> u, v;
vector<int> g[MXN];
int state[MXN];

bool dfs(int node)
{
	state[node] = 1;
	for (int c : g[node])
	{
		if (state[c] == 1)
			return true;
		if (state[c] == 0 && dfs(c))
			return true;
	}
	state[node] = 2;
	return false;
}

variant<bool, vector<int>> find_journey(int N, int M, vector<int> U, vector<int> V)
{
	n = N, m = M;
	u = U, v = V;
	for (int i = 0; i < m; i++)
		g[u[i]].pb(v[i]);
	return dfs(0);
}

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