제출 #831168

#제출 시각아이디문제언어결과실행 시간메모리
831168caganyanmaz수천개의 섬 (IOI22_islands)C++17
0 / 100
27 ms8140 KiB
#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]; bitset<MXN> visited; bool dfs(int node) { visited[node] = true; for (int c : g[node]) { if (visited[c]) return true; if (dfs(c)) return true; } visited[node] = false; 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*2 < n; i++) { g[u[i*2]].pb(v[i*2]); g[v[i*2]].pb(u[i*2]); } return dfs(0); }
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