제출 #1085998

#제출 시각아이디문제언어결과실행 시간메모리
1085998SamueleVid수천개의 섬 (IOI22_islands)C++17
0 / 100
22 ms8016 KiB
#include <bits/stdc++.h> using namespace std; constexpr int MAXN = 1e5 + 5; vector<int> adj[MAXN]; bool v[MAXN]; bool ciclo = 0; void dfs(int u, int p) { // cout << "u, p " << u << " " << p << '\n'; if (v[u]) { ciclo = 1; return; } v[u] = 1; for (auto x : adj[u]) { dfs(x, u); if (ciclo) return; } } variant<bool, vector<int>> find_journey(int N, int M, vector<int> U, vector<int> V) { fill(v, v + MAXN, 0); for (int i = 0; i < M; i ++) { adj[U[i]].push_back(V[i]); } dfs(0, -1); return ciclo; }
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