Cod sursa(job #1498023)

Utilizator CollermanAndrei Amariei Collerman Data 7 octombrie 2015 21:26:46
Problema Stramosi Scor 80
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.67 kb
#include <fstream>
using namespace std;
ofstream fout("stramosi.out");
ifstream fin("stramosi.in");

const int NMAX = 250005;

int n, m, x, y;
int ST[19][NMAX];

int main()
{
    fin >> n >> m;
    for(int i=1; i<=n; ++i)
        fin >> ST[0][i];

    int log = 0, p = 1;
    while (p <= n) {
        p *= 2;
        ++log;
    }
    --log;

    for(int j=1; j<=log; ++j)
        for(int i=1; i<=n; ++i)
            ST[j][i] = ST[j-1][ST[j-1][i]];
    for(int i=1; i<=m; ++i) {
        fin >> x >> y;
        for (int j = 0 ; y ; y >>= 1, ++j)
            if (y & 1)
                x = ST[j][x];
        fout << x << '\n';
    }
    return 0;
}