Submission #1134133

#	Time	Username	Problem	Language	Result	Execution time	Memory
1134133		Aviansh	Aesthetic (NOI20_aesthetic)	C++20	7 / 100	150 ms	26192 KiB

Aesthetic

#include <bits/stdc++.h>

using namespace std;

int n,m;

vector<int>fin;

void dfs(int st,vector<array<int,3>>(&g)[],int p, vector<int>(&pars)){
    if(st==n-1){
        for(int i : pars){
            fin.push_back(i);
        }
    }
    for(array<int,3>e:g[st]){
        if(e[0]==p)
            continue;
        pars.push_back(e[2]);
        dfs(e[0],g,st,pars);
        assert(pars.back()==e[2]);
        pars.pop_back();
    }
}

signed main(){
    ios::sync_with_stdio(0);
    cin.tie(0);
    cin >> n >> m;
    assert(m==n-1);
    vector<array<int,3>>g[n];
    array<int,3>edges[m];
    for(int i = 0;i<m;i++){
        cin >> edges[i][0];
        cin >> edges[i][1];
        cin >> edges[i][2];
        edges[i][0]--;
        edges[i][1]--;
        g[edges[i][0]].push_back({edges[i][1],edges[i][2],i});
        g[edges[i][1]].push_back({edges[i][0],edges[i][2],i});
    }
    long long pref[m];
    pref[m-1]=edges[m-1][2];
    for(int i = m-2;i>=0;i--){
        pref[i]=max(1LL*edges[i][2],pref[i+1]);
    }
    vector<int>temp;
    dfs(0,g,-1,temp);
    long long ans = 0;
    for(int i : fin){
        ans+=edges[i][2];
    }
    long long maxima = 0;
    for(int i : fin){
        if(i!=m-1)
            maxima=max(maxima,pref[i+1]);
    }
    ans+=maxima;
    cout << ans;
    return 0;
}

• Subtask 1: 0 / 5
• Subtask 2: 0 / 8
• Subtask 3: 7 / 7
• Subtask 4: 0 / 15
• Subtask 5: 0 / 16
• Subtask 6: 0 / 22
• Subtask 7: 0 / 27