Cod sursa(job #2351606)

Utilizator Turturica_DorinTurturica Dorin Turturica_Dorin Data 22 februarie 2019 16:13:54
Problema Stramosi Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.85 kb
#include <iostream>
#include <fstream>

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

int N, M, logn, i, j, k, a[ 18 ][ 250001 ], Q, P;

int main()
{
    fin >> N >> M;
    for ( i = 1; i <= N; i++ )
    {
        fin >> a[ 0 ][ i ];
    }
    for ( logn = 1, k = 0; logn < N; logn <<= 1, k++ );
    logn >>= 1;
    k--;
    for ( i = 1; i <= k; i++ )
    {
        for ( j = 1; j <= N; j++ )
        {
            a[ i ][ j ] = a[ i - 1 ][ a[ i - 1 ][ j ] ];
        }
    }
    for ( i = 1; i <= M; i++ )
    {
        fin >> Q >> P;
        while ( P > 0 )
        {
            for ( logn = 1, k = 0; logn <= P; logn <<= 1, k++ );
            logn >>= 1;
            k--;
            Q = a[ k ][ Q ];
            P -= logn;
        }
        fout << Q << '\n';
    }
    return 0;
}