Cod sursa(job #932952)

Utilizator Paula-ElenaPaula-Elena Margarit Paula-Elena Data 29 martie 2013 13:55:31
Problema Stramosi Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.64 kb
#include<fstream>
using namespace std;

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

const int MAXN = 250010;
int n, m, s[25][MAXN], p, q;

int main(){
    int i, j, step;
    fin >> n >> m;
    for(i=1; i<=n; ++i)
        fin >> s[0][i];

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

    for(i=0; i<m; ++i){
        fin >> q >> p;
        for(step=0; (1<<step)<=p; ++step) {
            if(((1<<step)&p) != 0)
                q = s[step][q];
        }
        fout << q << "\n";
    }

    fin.close();
    fout.close();

    return 0;
}