Cod sursa(job #3253699)

Utilizator iuliageambazuGeambazu Iulia iuliageambazu Data 4 noiembrie 2024 15:10:39
Problema Stramosi Scor 50
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.73 kb
#include <bits/stdc++.h>
#define int long long
using namespace std;

ifstream fin("stramosi.in");
ofstream fout("stramosi.out");

const int NMAX=25000,LOGMAX=20;
int n,m;
vector<int> logg(NMAX+5);
vector<vector<int>>anc(NMAX, vector<int>(LOGMAX));

signed main()
{
    fin>>n>>m;
    for(int i=1;i<=n;i++)
        fin>>anc[i][0];
    for(int i=2;i<=n;i++)
        logg[i]=logg[i/2]+1;
    for(int i=1;i<=n;i++)
        for(int j=1;j<=LOGMAX;j++)
        anc[i][j]=anc[anc[i][j-1]][j-1];
    for(int i=1;i<=m;i++)
    {
        int x,y;
        fin>>x>>y;
        while(y)
        {
            int k=logg[y];
            x=anc[x][k];
            y-=(1<<k);
        }
        fout<<x<<'\n';
    }
    return 0;
}