Submission #485254

#	Time	Username	Problem	Language	Result	Execution time	Memory
485254		SirCovidThe19th	Senior Postmen (BOI14_postmen)	C++17	100 / 100	370 ms	64100 KiB

postmen

#include <bits/stdc++.h>
using namespace std;

const int mx = 5e5 + 5;

int n, m, pth[mx]; bool vis[mx], useEdg[mx]; vector<pair<int, int>> adj[mx]; 

void dfs(int cur){
    if (vis[cur]){
        int cyc = cur;
        while (vis[cyc]){
            cout<<cyc<<" ";
            vis[cyc] = 0; cyc = pth[cyc];
        }
        cout<<"\n";
    }
    while (adj[cur].size()){
        int nxt, ind; 
        tie(nxt, ind) = adj[cur].back(); adj[cur].pop_back();
        if (!useEdg[ind]){
            useEdg[ind] = vis[cur] = 1;
            pth[cur] = nxt;
            dfs(nxt);
        }
    }
}

int main(){
    ios_base::sync_with_stdio(0); cin.tie(0); 
    cin >> n >> m;
    for (int i = 1; i <= m; i++){
        int a, b; cin >> a >> b;
        adj[a].push_back({b, i}); adj[b].push_back({a, i});
    }
    dfs(1);
}

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