Cod sursa(job #1632504)

Utilizator iulian_f2kGuraliuc Iulian iulian_f2k Data 6 martie 2016 10:21:44
Problema Stramosi Scor 0
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.84 kb
#include <iostream>
#include <fstream>
#include <vector>
#define IMAX 18
using namespace std;

vector<int> T;
int D[250005][19], N, M, Q, P, k;

void dinamica()
{
    for(int i=0; i<=N; ++i)
        D[i][0] = T[i];
    for( k=1; k<=N;k = k<<1);
    k = k>>1;
    for(int j=1; j<=k; ++j)
        for(int i=1; i<=N; ++i)
            D[i][j] = D[ D[i][j-1] ][j-1];
}

int main()
{
    freopen("stramosi.in", "rt", stdin);
    freopen("stramosi.out", "wt", stdout);
    scanf("%d%d", &N, &M);
    T.push_back(0);
    int x;
    for(int i=1; i<=N; ++i){
        scanf("%d", &x);
        T.push_back(x);
    }
    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;
}