Submission #1126691

#	Time	Username	Problem	Language	Result	Execution time	Memory
1126691		Ciprian	Village (BOI20_village)	C++20	12 / 100	1096 ms	2784 KiB

Village

#include <bits/stdc++.h>
using namespace std;
#define int long long 
const int N=1e5+4;
vector<int> adj[N];
int dfs(int s, int p, int f, int cnt){
    if(s==f)return cnt;
    for(auto e: adj[s]){
        if(e==p)continue;
        int r=dfs(e, s, f, cnt+1);
        if(r>0)return r;
    }return 0;
}
int32_t main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n;
    cin>>n;
    vector<int> a;
    
    for(int i=1; i<n; i++){

        a.push_back(i);
        int u,v;
        cin>>u>>v;
        adj[u].push_back(v);
        adj[v].push_back(u);
    }a.push_back(n);
    vector<int> small(n+1), largest(n+1);
    int mn=1e9, mx=0;
    do{
        bool check=true;
        for(int i=0; i<n; i++){
            if(a[i]==i+1)check=false;
        }if(check){
            int sum=0;
            for(int i=0; i<n; i++){
                sum+=dfs(a[i], a[i], i+1, 0);
            }if(sum>mx){
                mx=sum;
                for(int i=0; i<n; i++){
                    largest[i]=a[i];
                }
            }if(sum<mn){
                mn=sum;
                for(int i=0; i<n; i++){
                    small[i]=a[i];
                }
            }   
        }
    }while(next_permutation(a.begin(), a.end()));
    cout<<mn<<" "<<mx<<endl;
    for(int j=0; j<n; j++){
        cout<<small[j]<<" ";
    }cout<<endl;
    for(int j=0; j<n; j++){
        cout<<largest[j]<<" ";
    }
    return 0;
}

• Subtask 1: 12 / 12
• Subtask 2: 0 / 38
• Subtask 3: 0 / 50