Cod sursa(job #1219028)

Utilizator grayshadeLaurentiu Nicola grayshade Data 13 august 2014 10:49:42
Problema Stramosi Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.74 kb
#include <fstream>

using namespace std;

int a[19][250001];

int main()
{
    ifstream fi("stramosi.in");
    ofstream fo("stramosi.out");
    
    int n, m, p, q;

    fi >> n >> m;
    for (int i = 1; i <= n; i++)
        fi >> a[0][i];

    bool ok = true;
    for (int i = 1; i <= 18 && ok; i++)
    {
        ok = false;
        for (int j = 1; j <= n; j++)
        {
            a[i][j] = a[i - 1][a[i - 1][j]];
            ok |= a[i][j];
        }
    }

    while (m-- > 0)
    {
        fi >> q >> p;

        for (int k = 1 << 18, t = 18; t >= 0; k >>= 1, t--)
            if (p >= k)
            {
                q = a[t][q];
                p -= k;
            }

        fo << q << '\n';
    }
}