Submission #1227482

#	Time	Username	Problem	Language	Result	Execution time	Memory
1227482		PVM_pvm	Tree (IOI24_tree)	C++20	10 / 100	2096 ms	26016 KiB

tree

#include "tree.h"
#include<bits/stdc++.h>
using namespace std;
#define MAXN 200'007
int n;
vector<int> p, w;
vector<int> v[MAXN];

void init(std::vector<int> P, std::vector<int> W) {
  p = P;
  w = W;
  n = (int)p.size();
  for (int q=1;q<n;q++)
  {
      v[ p[q] ].push_back(q);
  }
}
long long c[MAXN];
long long suma[MAXN];
void dfs(int x, int L, int R)
{
    if (v[x].size()==0)
    {
        suma[x]=L;
        c[x]=L;
        //cout<<x<<" "<<suma[x]<<"\n";
        return;
    }
    suma[x]=0;
    for (int q=0;q<v[x].size();q++)
    {
        //cout<<"dete mi e "<<v[x][q]<<"\n";
        dfs(v[x][q],L,R);
        suma[x]+=suma[ v[x][q] ];
    }
    //cout<<x<<" "<<suma[x]<<"\n";
    if (suma[x]>R)
    {
        c[x]=R-suma[x];
        suma[x]=R;
    }
    else
    {
        c[x]=0;
    }
}
long long query(int L, int R) {
    dfs(0,L,R);
    long long ans=0;
    for (int q=0;q<n;q++)
    {
        if (c[q]<0) ans+=w[q]*c[q]*-1;
        else ans+=w[q]*c[q];
    }
    return ans;
}

• 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