Submission #466235

#	Time	Username	Problem	Language	Result	Execution time	Memory
466235		AmirElarbi	Senior Postmen (BOI14_postmen)	C++17	100 / 100	481 ms	58740 KiB

postmen

#include <bits/stdc++.h>
#define vi vector<int>
#define ve vector
#define ll long long
#define vf vector<float>
#define vll vector<pair<ll,ll>>
#define ii pair<int,int>
#define vvi vector<vi>
#define vii vector<ii>
#define gii greater<ii>
#define pb push_back
#define fi first
#define se second
#define INF 1e7
#define unsigned u
#define eps 1e-18
#define eps1 1e-25
#define optimise ios_base::sync_with_stdio(false);cin.tie(NULL);
#define MAX_A 100005
#define V 450
using namespace std;
const int maxn = 5e5 + 5;
struct edge { int fi, se; };
ve<edge> adj[maxn];
bool vis[maxn], tv[maxn];
int parent[maxn];
void dfs(int u){
    if(tv[u]){
        while(tv[u]){
            cout << u+1 << " ";
            tv[u] = 0;
            u = parent[u];
        }
        cout << "\n";
    }
    while(!adj[u].empty()){
        edge x =adj[u].back();
        adj[u].pop_back();
        if(!vis[x.se]){
            vis[x.se] = 1;
            tv[u] = 1;
            parent[u] = x.fi;
            dfs(x.fi);
        }
    }
}
int main(){
    optimise;
    int n,m,a,b;
    cin >> n >> m;
    for (int i = 0; i < m; ++i)
    {
        cin >> a >>b;
        a--,b--;
        adj[a].pb({b,i});
        adj[b].pb({a,i});
    }
    dfs(0);
}

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