Submission #897326

#	Time	Username	Problem	Language	Result	Execution time	Memory
897326		juliany2	Worst Reporter 4 (JOI21_worst_reporter4)	C++17	14 / 100	74 ms	197204 KiB

worst_reporter2

#include<bits/stdc++.h>
using namespace std;
using ll = long long;
#define all(x) (x).begin(), (x).end()

const int N = 5007;
int n;
int h[N], c[N];
vector<int> adj[N];
ll dp[N][N];

void dfs(int v = 1) {
    for (int u : adj[v]) {
        dfs(u);

        for (int i = 1; i <= n; i++)
            dp[v][i] += dp[u][i];
    }

    for (int i = 1; i <= h[v]; i++)
        dp[v][i] = max(dp[v][i], dp[v][h[v]] + c[v]);
}

int main() {
    cin.tie(0)->sync_with_stdio(false);

    cin >> n;

    ll sum = 0;
    vector<int> cmp = {0};
    for (int i = 1; i <= n; i++) {
        int p;
        cin >> p >> h[i] >> c[i];

        if (i != 1)
            adj[p].push_back(i);

        cmp.push_back(h[i]);
        sum += c[i];
    }

    sort(all(cmp));
    cmp.erase(unique(all(cmp)), cmp.end());

    for (int i = 1; i <= n; i++)
        h[i] = lower_bound(all(cmp), h[i]) - cmp.begin();

    dfs();

    cout << sum - *max_element(dp[1] + 1, dp[1] + n + 1) << '\n';

    return 0;
}

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