Submission #961023

#	Time	Username	Problem	Language	Result	Execution time	Memory
961023		noyancanturk	Senior Postmen (BOI14_postmen)	C++17	55 / 100	310 ms	19220 KiB

postmen

#ifndef Local
    #pragma GCC optimize("O3,unroll-loops")
#endif
    
#include "bits/stdc++.h"
using namespace std;
    
#define int int64_t
#define pb push_back
    
const int lim=2e5+100;
const int mod=998244353;
//const int mod=(1ll<<61)-1;
 
using pii=pair<int,int>;

vector<pii>v[lim];
bool vis[lim];
vector<int>path;

void dfs(int node){
    while(v[node].size()){
        pii now=v[node].back();
        v[node].pop_back();
        if(vis[now.second])continue;
        vis[now.second]=1;
        dfs(now.first);
    }
    path.pb(node);
}

inline void solve(){
    int n,m;
    cin>>n>>m;
    for(int i=0;i<m;i++){
        int x,y;
        cin>>x>>y;
        v[x].pb({y,i});
        v[y].pb({x,i});
    }
    dfs(1);
    vector<int>cur;
    bool seen[n+1];
    memset(seen,0,sizeof(seen));
    for(int j:path){
        cerr<<j<<" ";
        if(seen[j]){
            cout<<j<<" ";
            while(cur.back()!=j){
                cout<<cur.back()<<" ";
                seen[cur.back()]=0;
                cur.pop_back();
            } 
            cout<<"\n";
        }else{
            cur.push_back(j);
            seen[j]=1;
        }
    }
}
    
signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
#ifdef Local  
    freopen(".in","r",stdin);
    freopen(".out","w",stdout);
#endif
    int t=1;
    //cin>>t;
    while (t--)
    {
        solve();
    }
}

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