제출 #212372

#제출 시각아이디문제언어결과실행 시간메모리
212372dolphingarlic어르신 집배원 (BOI14_postmen)C++14
100 / 100
461 ms47224 KiB
#include <bits/stdc++.h> #pragma GCC optimize("unroll-loops") #pragma GCC optimize("O3") #pragma GCC target("sse4,avx2,fma,avx") using namespace std; vector<pair<int, int>> g[500001]; bool v[500001], u[500001]; int nxt[500001]; void dfs(int node) { if (v[node]) { while (v[node]) { v[node] = false; cout << node << ' '; node = nxt[node]; } cout << '\n'; } while (g[node].size()) { int c, idx; tie(c, idx) = g[node].back(); g[node].pop_back(); if (!u[idx]) { u[idx] = true; v[node] = true; nxt[node] = c; dfs(c); } } } int main() { ios_base::sync_with_stdio(0); cin.tie(0); int n, m; cin >> n >> m; for (int i = 0; i < m; i++) { int a, b; cin >> a >> b; g[a].push_back({b, i}); g[b].push_back({a, i}); } dfs(1); return 0; }
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