제출 #261226

#제출 시각아이디문제언어결과실행 시간메모리
261226eohomegrownapps어르신 집배원 (BOI14_postmen)C++14
55 / 100
761 ms111920 KiB
#include <bits/stdc++.h> using namespace std; int tarr[500000]; int ptr = 0; bool visited[500000]; unordered_set<int> adjlist[500000]; inline void deleteEdge(int a, int b){ adjlist[a].erase(b); adjlist[b].erase(a); } void tour(int node){ while (adjlist[node].size()>0){ int newnode = *adjlist[node].begin(); deleteEdge(node, newnode); tour(newnode); } int i = node; if (visited[i]){ cout<<i+1<<' '; while (ptr>0&&tarr[ptr-1]!=i){ cout<<tarr[ptr-1]+1<<' '; visited[tarr[ptr-1]]=false; ptr--; } cout<<'\n'; } else { visited[i]=true; ptr++; tarr[ptr-1]=i; } } int main(){ cin.tie(0); ios_base::sync_with_stdio(0); int n,m; cin>>n>>m; for (int i = 0; i<n; i++){ visited[i]=0; } //adjlist.resize(n); for (int i = 0; i<m; i++){ int a,b; cin>>a>>b; a--;b--; adjlist[a].insert(b); adjlist[b].insert(a); } tour(0); }
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