Cod sursa(job #2570135)

Utilizator AndreiJJIordan Andrei AndreiJJ Data 4 martie 2020 15:13:58
Problema Stramosi Scor 100
Compilator cpp-64 Status done
Runda Arhiva de probleme Marime 0.77 kb
#include <fstream>

using namespace std;

const int N = 250005;

int dp[21][N], n, exp[N];

void Read ()
{
    ifstream fin ("stramosi.in");
    int q;
    fin >> n >> q;
    for (int i = 1; i <= n; i++)
        fin >> dp[0][i];
    for (int i = 1; (1 << i) <= n; i++)
        exp[(1 << i)] = i;
    for (int i = 1; (1 << i) <= n; i++)
        for (int j = 1; j <= n; j++)
            dp[i][j] = dp[i - 1][dp[i - 1][j]];
    ofstream fout ("stramosi.out");
    while (q--)
    {
        int q, p, x;
        fin >> q >> p;
        while (p > 0)
        {
            x = exp[p & (-p)];
            q = dp[x][q];
            p -= (p & (-p));
        }
        fout << q << "\n";
    }
    fout.close();
}


int main()
{
    Read();
    return 0;
}