Submission #31520

#	Time	Username	Problem	Language	Result	Execution time	Memory
31520		minhtung0404	Senior Postmen (BOI14_postmen)	C++14	55 / 100	620 ms	141244 KiB

postmen

#include<bits/stdc++.h>
const int N = 5e5 + 5;
using namespace std;

typedef pair <int, int> ii;

set <int> adj[N];
vector <int> mv[N];

int n, m, a, b, cnt;
bool check[N], edge[N];
stack <int> ms;

void dfs(int u){
    while (adj[u].size()){
        int v = *adj[u].begin();
        adj[u].erase(adj[u].begin()); adj[v].erase(u);
        dfs(v);
    }
    if (check[u]){
        while (ms.top() != u){
            cout << ms.top() << " ";
            check[ms.top()] = 0;
            ms.pop();
        }
        cout << u << "\n";
        ms.pop();
        check[u] = 0;
    }

    check[u] = 1;
    ms.push(u);
}

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

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