Submission #397115

#	Time	Username	Problem	Language	Result	Execution time	Memory
397115		fedoseevtimofey	Worst Reporter 4 (JOI21_worst_reporter4)	C++14	0 / 100	8 ms	1868 KiB

worst_reporter2

#include <iostream>
#include <string>
#include <vector>
#include <queue>
#include <deque>
#include <stack>
#include <set>
#include <map>
#include <unordered_map>
#include <unordered_set>
#include <cstring>
#include <cmath>
#include <cstdlib>
#include <algorithm>
#include <random>
#include <iomanip>
#include <functional>
#include <cassert>
#include <bitset>
#include <chrono>
 
using namespace std;
 
typedef long long ll;
 
int main() {
  ios_base::sync_with_stdio(false); cin.tie(0);
#ifdef LOCAL
  freopen("input.txt", "r", stdin);
#endif
  int n;
  cin >> n;
  vector <int> a(n), h(n), c(n);
  vector <vector <int>> g(n);
  for (int i = 0; i < n; ++i) {
    cin >> a[i] >> h[i] >> c[i];
    --a[i];
    if (a[i] != i) {
      g[a[i]].push_back(i);
    }
  }
  vector <map <int, ll>> dp(n);
  auto dfs = [&] (int u, int p, auto&& dfs) -> void {
    for (auto v : g[u]) {
      if (v != p) {
        dfs(v, u, dfs);
        if (dp[v].size() > dp[u].size()) swap(dp[u], dp[v]);
        for (auto p : dp[v]) dp[u][p.first] += p.second;
      }
    }
    dp[u][1] += c[u];
    dp[u][h[u]] -= c[u];
    dp[u][h[u] + 1] += c[u];
    while (dp[u][h[u]] < 0) {
      auto it = dp[u].find(h[u]);
      auto jt = prev(it);
      it->second += jt->second;
      dp[u].erase(jt);
    }
    if (dp[u][h[u]] == 0) dp[u].erase(h[u]);
  };
  dfs(0, -1, dfs);
  ll ans = 2e18;
  ll sum = 0;
  for (auto p : dp[0]) {
    sum += p.second;
    ans = min(ans, sum);
  }
  cout << ans << '\n';
}

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