Cod sursa(job #1889249)

Utilizator LolkekzorChiorean Tudor Lolkekzor Data 22 februarie 2017 17:23:03
Problema Stramosi Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.68 kb
#include <fstream>
using namespace std;

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

int n, m, i, q, p, k, jmp;
int T[25][250010], logDyn[250010];

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

    for(i = 2 ; i <= n ; i++)
        logDyn[i] = logDyn[i / 2] + 1;

    for(i = 1 ; i <= m ; i++) {
        fin>>q>>p;
        do {
            jmp = logDyn[p];
            p -= (1 << jmp);
            q = T[jmp][q];
        } while (q != 0 && p > 0);

        fout<<q<<'\n';
    }

    return 0;
}