Cod sursa(job #1632576)

Utilizator iulian_f2kGuraliuc Iulian iulian_f2k Data 6 martie 2016 10:31:05
Problema Stramosi Scor 90
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.64 kb
#include <iostream>
#include <fstream>
using namespace std;

int D[250005][19], N, M, Q, P;

void dinamica()
{
    for(int j=1; (1<<j)<=N; ++j)
        for(int i=1; i<=N; ++i)
            D[i][j] = D[ D[i][j-1] ][j-1];
}

int main()
{
    freopen("stramosi.in", "r", stdin);
    freopen("stramosi.out", "w", stdout);
    scanf("%d%d", &N, &M);
    for(int i=1; i<=N; ++i)
        scanf("%d", &D[i][0]);
    dinamica();
    for(int i=1; i<=M; ++i)
    {
        scanf("%d%d", &Q, &P);
        for(int j=0; (1<<j)<=P; ++j)
            if(P & (1<<j))
                Q = D[Q][j];
        cout<<Q<<'\n';
    }
    return 0;
}