Cod sursa(job #2883008)

Utilizator cdenisCovei Denis cdenis Data 1 aprilie 2022 01:17:16
Problema Stramosi Scor 90
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.61 kb
#include <iostream>
#include <fstream>

using namespace std;

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

const int MAX=25e4+5;
const int LOG=20;
int n,m,up[MAX][LOG];

int main()
{
    fin >> n >> m;
    for(int i=1;i<=n;i++)
        fin >> up[i][0];
    for(int i=1;(1<<i)<=n;i++)
        for(int nod=1;nod<=n;nod++)
            up[nod][i]=up[up[nod][i-1]][i-1];
    while(m--)
    {
        int k,nod;
        fin >> nod >> k;
        for(int i=0;(1<<i)<=k;i++)
            if(k&(1<<i))
                nod=up[nod][i];
        fout << nod << '\n';
    }
    return 0;
}