Submission #941126

#	Time	Username	Problem	Language	Result	Execution time	Memory
941126		Sir_Ahmed_Imran	Senior Postmen (BOI14_postmen)	C++17	100 / 100	377 ms	90596 KiB

postmen

                              ///~~~LOTA~~~///
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define append push_back
#define add insert
#define nl "\n"
#define ff first
#define ss second
#define pii pair<int,int>
#define all(x) (x).begin(),(x).end()
#define L0TA ios_base::sync_with_stdio(false);cin.tie(NULL)
#define N 500001
int st;
int vis[N];
int evis[N];
vector<int> x;
vector<pii> a[N];
void dfs(int v){
    int u;
    vis[v]=1;
    x.append(v);
    while(!a[v].empty()){
        while(!a[v].empty() && evis[a[v].back().ss])
            a[v].pop_back();
        if(a[v].empty()){
            x.pop_back();
            return;
        }
        u=a[v].back().ff;
        evis[a[v].back().ss]=1;
        if(vis[u]){
            cout<<u<<' ';
            while(x.back()!=u){
                cout<<x.back()<<' ';
                vis[x.back()]=0;
                x.pop_back();
            }
            cout<<nl;
            st=u;
        }
        else dfs(u);
        if(v!=st) return; 
    }
}
void solve(){
    int n,m,o,p,q,r;
    cin>>n>>m;
    for(int i=0;i<m;i++){
        cin>>p>>q;
        a[p].append({q,i});
        a[q].append({p,i});
    }
    for(int i=1;i<=n;i++)
        dfs(i);
}
int main(){
    L0TA;
    solve();
    return 0;
}

Compilation message (stderr)

postmen.cpp: In function 'void solve()':
postmen.cpp:47:13: warning: unused variable 'o' [-Wunused-variable]
   47 |     int n,m,o,p,q,r;
      |             ^
postmen.cpp:47:19: warning: unused variable 'r' [-Wunused-variable]
   47 |     int n,m,o,p,q,r;
      |                   ^

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