Submission #1010152

#	Time	Username	Problem	Language	Result	Execution time	Memory
1010152		Unforgettablepl	Worst Reporter 4 (JOI21_worst_reporter4)	C++17	14 / 100	2048 ms	197088 KiB

worst_reporter2

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

#define int long long


int32_t main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    int n;
    cin >> n;
    vector<vector<int>> adj(n+1);
    vector<int> H(n+1);
    vector<int> Hs(n+1);
    vector<int> C(n+1);
    int a;cin>>a>>H[1]>>C[1];Hs[1]=H[1];
    for(int i=2;i<=n;i++){
        cin>>a>>H[i]>>C[i];Hs[i]=H[i];
        adj[a].emplace_back(i);
    }
    sort(Hs.begin(),Hs.end());
    Hs.erase(unique(Hs.begin(),Hs.end()),Hs.end());
    int k = Hs.size();
    function<vector<int>(int)> dfs = [&](int x){
        vector<int> DP(k);
        for(int i=0;i<k;i++)if(Hs[i]!=H[x])DP[i]=C[x];
        for(int&i:adj[x]){
            auto curr = dfs(i);
            for(int j=0;j<k;j++)DP[j]+=curr[j];
        }
        for(int i=k-2;i>=0;i--)DP[i]=min(DP[i],DP[i+1]);
        return DP;
    };
    cout << dfs(1)[0] << '\n';
}

• Subtask 1: 14 / 14
• Subtask 2: 0 / 65
• Subtask 3: 0 / 21