Cod sursa(job #2116061)

Utilizator patcasrarespatcas rares danut patcasrares Data 27 ianuarie 2018 12:08:25
Problema Cerere Scor 30
Compilator cpp Status done
Runda Arhiva de probleme Marime 1.01 kb
#include<fstream>
#include<iostream>
#include<vector>
#include<cmath>
#include<queue>
#define DN 100005
#define pb push_back
using namespace std;
ifstream fin("cerere.in");
ofstream fout("cerere.out");
int n,p,q,dp[DN],k[DN],pr[25][DN],d,f;
vector<int>v[DN];
void dfs(int nod)
{
    if(k[nod]!=0)
    {
        f=k[nod];
        d=nod;
        for(int i=20;i>=0&&f;i--)
            if((1<<i)<=f)
            {
                d=pr[i][d];
                f-=(1<<i);
            }
        dp[nod]=dp[d]+1;
    }
    for(auto i:v[nod])
        dfs(i);
}
int main()
{
    fin>>n;
    for(int i=1;i<=n;i++)
        fin>>k[i];
    for(int i=1;i<n;i++)
    {
        fin>>p>>q;
        pr[0][q]=p;
        v[p].pb(q);
    }
    for(int j=1;j<25;j++)
        for(int i=1;i<=n;i++)
            pr[j][i]=pr[j-1][pr[j-1][i]];
    for(int i=1;i<=n;i++)
        if(pr[0][i]==0)
        {
            dfs(i);
            break;
        }
    for(int i=1;i<=n;i++)
        fout<<dp[i]<<' ';
}