Cod sursa(job #3231265)

Utilizator MihneaCucuMihnea Cucu MihneaCucu Data 25 mai 2024 15:04:28
Problema Stramosi Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 1.74 kb
/*#include <iostream>
#include <vector>
#include <fstream>

using namespace std;

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

int n,m;

int main()
{

    fin >> n >> m;
    vector<vector<int>> v(20, vector<int>(n + 1));

    for (int i = 1; i <= n; ++i)
    {
        fin >> v[0][i];
    }

    for (int i = 1; i < 20; ++i)
    {
        for (int j = 1; j <= n; j += 1)
        {
            v[i][j] = v[i - 1][v[i - 1][j]];
        }
    }

    for (int i = 1; i <= m; ++i)
    {
        int x, y;
        cin >> x >> y;

        int exponent = 0;

        /// facem descompunerea lui in baza 2 si se calculeaza cel de al 2^exponent stramos

        while (y)
        {
            if (y % 2 == 1)
            {
                x = v[exponent][x];
            }

            exponent += 1;
            y /= 2;
        }

        fout << x << '\n';
    }
    return 0;
}
 */

#include <fstream>
#include <vector>
#include <iostream>

using namespace std;

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



int main()
{
    int n,m;
    fin >> n >> m;
    vector<vector<int>> v(20, vector<int>(n + 1));


    for (int i = 1; i <= n; i++)
    {
        fin >> v[0][i];
    }


    for (int i = 1; i < 20; i++)
    {
        for (int j = 1; j <= n; j++)
        {
            v[i][j] = v[i - 1][v[i - 1][j]];
        }
    }

    for (int i = 1; i <= m; i++)
    {
        int x, y;
        fin >> x >> y;

        int exponent = 0;

        /// facem descompunerea lui in baza 2 si se calculeaza cel de al 2^exponent stramos
        while (y)
        {
            if (y % 2 == 1)
            {
                x = v[exponent][x];
            }

            exponent += 1;
            y = y / 2;
        }

        fout << x << '\n';
    }
    return 0;
}