Submission #1055777

#	Time	Username	Problem	Language	Result	Execution time	Memory
1055777		kebine	Senior Postmen (BOI14_postmen)	C++17	0 / 100	10 ms	14684 KiB

postmen

#include <bits/stdc++.h>
#define pb push_back
#define int long long
#define repp(i,x,n) for(int i=x;i<=n;i++)
#define repo(i,x,n) for(int i=x;i>=n;i--)
#define cy cout<<"Yes"<<endl
#define cn cout<<"No"<<endl
#define r0 return 0
#define fi first
#define se second
#define mp make_pair
#define liow ios_base::sync_with_stdio(false);cin.tie(NULL)
#define jelek cout<<"jelek"<<endl
#define pii pair<int,int>
#define all(v) v.begin(),v.end()
#define pi pair<pair<int,int>,pair<int,int>>
#define p3 pair<int,pair<int,int>>
#define p4 pair<pii,pii>
#define fl fflush(stdout)
#define lb long double
using namespace std;
const int mod2=1e9+7,mod=998244353,maxn=5e5+5,N=(1<<17),INF=1e18;
vector<pii>adj[maxn];
bool visi[maxn];
vector<int>node;
int ej[maxn];
int deg[maxn];

void dfs(int x){
//  cout<<"x "<<":"<<x<<endl;
  node.pb(x);
  visi[x]=1;
  deg[x]--;
  for(pii i :adj[x]){
    if(ej[i.se]) continue;
    if(visi[i.fi]){
//      cout<<"anj ";
//      for(int i=0;i<node.size();i++){
//        cout<<node[i]<<" ";
//      }
//      cout<<endl;
    int last=-1;
    if(deg[i.fi]>0) last=i.fi;
      while(!node.empty()){
        cout<<node.back()<<" ";
        visi[node.back()]=0;
        if(last==-1) if(deg[node.back()]>0) last=node.back();
        if(node.back()==i.fi){
          node.pop_back();
          break;
        }
        node.pop_back();
      }
      cout<<endl;
      
      ej[i.se]=1;
      if(last!=-1) dfs(last);
    } else {
      ej[i.se]=1;
      deg[i.fi]--;
      dfs(i.fi);
    }
  }  
}

void solve(){
  int n,m;cin>>n>>m;
  repp(i,1,m){
    int u,v;cin>>u>>v;
    adj[u].pb({v,i});
    adj[v].pb({u,i});
    deg[u]++;
    deg[v]++;
  }
  dfs(1);
}

signed main(){
    liow;
    int t=1;
 //  cin>>t;
    while(t--){
      solve();
  }
}

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