Submission #1074994

#	Time	Username	Problem	Language	Result	Execution time	Memory
1074994		XJP12	Senior Postmen (BOI14_postmen)	C++14	0 / 100	51 ms	80180 KiB

postmen

#include <bits/stdc++.h>
using namespace std;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef long long ll;
vi mp;
vvi g;
vi path;
vi vis;
ll map_hash(ll a, ll b){
	if(a>b) swap(a,b);
	return a*1e5+b;

}
void dfs(int u){
	path.push_back(u);
	//cout<<u<<" "<<vis[u]<<endl;
	if(vis[u]==true){
	//	cout<<"hola"<<endl;
		int x = u;
//		cout<<"a"<<endl;
		int size=(int)path.size()-1;
//		cout<<size<<endl;
		do{
			//cout<<size<<endl;
			cout<<path[size]<<" ";
			vis[path[size]]=false;
			path.pop_back();
			size=(int)path.size()-1;
			//cout<<size<<endl;
		}while(path[size]!=x && size>0);
		cout<<'\n';
	}
	vis[u]=true;
	for(auto v: g[u]){
		vis[u]=true;
		int a=u, b=v;
		if(mp[map_hash(a, b)]!=1){
		//	cout<<a<<" "<<b<<endl;
			mp[map_hash(a, b)]=1;
			dfs(v);
		}
	}

}
int main() {
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cout.tie(NULL);
	int n,m;
	cin>>n>>m;
	g.resize(n+1,vi());
	vis.resize(n+1,0);
	mp.resize(1e7,0);
	for(int i=0; i<m; i++){
		int a,b;
		cin>>a>>b;
		mp[map_hash(a, b)] = 0;
		g[a].push_back(b);
		g[b].push_back(a);
	}
	dfs(1);
}

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