제출 #777579

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
777579		MasterTaster	어르신 집배원 (BOI14_postmen)	C++14	55 / 100	610 ms	85920 KiB

postmen

#include <bits/stdc++.h>

#define ll long long
#define pii pair<int, int>
#define xx first
#define yy second
#define pb push_back
#define MAXN 500010

using namespace std;

int n, m, deg[MAXN];
vector<int> put, tren;
set<int> g[MAXN];
bool bio[MAXN];

int main(){
	cin>>n>>m;

	for (int i=0; i<m; i++)
	{
		int u, v; cin>>u>>v;
		g[u].insert(v);
		g[v].insert(u);
		deg[u]++;
		deg[v]++;  
	}
	//cout<<"ee"<<endl;

	stack<int> st;
	st.push(1);
	while (!st.empty())
	{
		int u=st.top();
		if (deg[u]==0)
		{
			put.pb(u);
			st.pop();
			continue;
		}
		int v=(*g[u].begin());
		g[u].erase(v);
		g[v].erase(u);
		deg[u]--;
		deg[v]--;
		st.push(v);
	}

	//for (auto x:put) cout<<x<<" ";
	//cout<<endl;

	for (int i=0; i<put.size(); i++)
	{
		int u=put[i];
		st.push(u);
		if (bio[u])
		{
			tren.clear();
			int nes=0;
			while (!nes || st.top()!=u)
			{
				nes++;
				bio[st.top()]=false;
				tren.pb(st.top());
				st.pop();
			}
			for (auto x:tren) cout<<x<<" ";
			cout<<endl;
		}
		bio[u]=true;
	}
	
	cout<<endl;

}

컴파일 시 표준 에러 (stderr) 메시지

postmen.cpp: In function 'int main()':
postmen.cpp:52:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   52 |  for (int i=0; i<put.size(); i++)
      |                ~^~~~~~~~~~~

• Subtask 1: 38 / 38
• Subtask 2: 17 / 17
• Subtask 3: 0 / 45