Submission #1054064

#	Time	Username	Problem	Language	Result	Execution time	Memory
1054064		warrenn	Senior Postmen (BOI14_postmen)	C++14	0 / 100	7 ms	18524 KiB

postmen

#include<bits/stdc++.h>
using namespace std;
#define int long long 
 
vector<pair<int,int> >adj[500002];
int sz[500002];
bool edge[500002];
bool node[500002];
vector<int>ans;
int last[500002];

vector<int>simpan;
void dfs(int q){
    if(node[q]==true){
        
        while(!ans.empty()){
            int tmp=ans.back();
            if(tmp==q){
                cout<<q<<endl;
                break;
            }
            else{
                cout<<tmp<<" ";
                node[tmp]=false;
                ans.pop_back();
            }
        }
    }  
    else{
        ans.push_back(q);
    } 
    node[q]=true;
 
    for(int u=last[q];u<adj[q].size();u++){
        pair<int,int>r=adj[q][u];
        if(edge[r.second]==false){
            edge[r.second]=true;
            sz[q]--;
            sz[r.first]--;
            dfs(r.first);
            last[q]++;
            break;
        }
        else{
            last[q]++;
        }
    }
 
}
 
 
signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int n,m;
    cin>>n>>m;
    int cnt=1;
    for(int q=1;q<=m;q++){
        int u,v;
        cin>>u>>v;
        sz[u]++;
        sz[v]++;
        adj[u].push_back({v,cnt});
        adj[v].push_back({u,cnt});
        cnt++;
    }
 
    for(int q=1;q<=n;q++){
        if(sz[q]>0){
            memset(node,false,sizeof node);
            dfs(q);
        }
    }
    
}

Compilation message (stderr)

postmen.cpp: In function 'void dfs(long long int)':
postmen.cpp:34:24: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   34 |     for(int u=last[q];u<adj[q].size();u++){
      |                       ~^~~~~~~~~~~~~~

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