Submission #1265012

#	Time	Username	Problem	Language	Result	Execution time	Memory
1265012		nicolo_010	Tree (IOI24_tree)	C++20	10 / 100	2094 ms	27988 KiB

tree

#include "tree.h"
#include <bits/stdc++.h>
using namespace std;
template <typename T>
using v = vector<T>;
using ll = long long;
#define rep(i, k, n) for (int i=k; i<n; i++)

#define cerr if(0) cerr

v<int> p, w;
int N;
v<v<int>> adj;
v<int> leaf;
v<int> isleaf;

void dfs(int n, int p=-1) {
  bool can = true;
  for (auto x : adj[n]) {
    if (x == p) continue;
    can = false;
    dfs(x, n);
  }
  if (can) leaf.push_back(n);
}

void init(std::vector<int> P, std::vector<int> W) {
  p = P;
  w = W;
  N = (int)p.size();
  adj.resize(N);
  rep(i, 1, N) {
    //cerr << i << endl;
    adj[P[i]].push_back(i);
    adj[i].push_back(P[i]);
  }
  isleaf.assign(N, 0);
  dfs(0);
  for (auto x : leaf) isleaf[x]=1;
}

long long query(int L, int R) {
  v<ll> C(N);
  v<ll> val(N, 0);
  for (int i=N-1; i>=0; i--) {
    //cerr << i << endl;
    if (isleaf[i]) {
      C[i] = L;
      val[i] = L;
    }
    else {
      while (val[i] > R) {
        val[i]--;
        C[i]--;
      }
    }
    if (i == 0) continue;
    val[p[i]]+=val[i];
  }
  ll sum=0;
  rep(i, 0, N) {
    cerr << C[i] << " ";
    sum += w[i]*abs(C[i]);
  }
  cerr << endl;
  return sum; 
}

• Subtask 0: 0 / 0
• Subtask 1: 10 / 10
• Subtask 2: 0 / 13
• Subtask 3: 0 / 18
• Subtask 4: 0 / 7
• Subtask 5: 0 / 11
• Subtask 6: 0 / 22
• Subtask 7: 0 / 19