Cod sursa(job #878574)

Utilizator ephgstefana gal ephg Data 14 februarie 2013 16:10:45
Problema Stramosi Scor 100
Compilator cpp Status done
Runda Arhiva de probleme Marime 0.58 kb
#include<fstream>
using namespace std;

#define BM 250005

int n,m;
int pre[25][BM];

int main () {
    int i,j,p,q,t,c,cn;
    ifstream f("stramosi.in");
    ofstream g("stramosi.out");
    f>>n>>m;
    for(i=1;i<=n;++i)f>>pre[0][i];
    for(i=1,cn=0;i<=n;i=(i<<1),++cn);
    for(i=1;i<=cn;++i)for(j=1;j<=n;++j)pre[i][j]=pre[i-1][pre[i-1][j]];
    for(i=1;i<=m;++i){
        f>>q>>p;
        t=q;
        for(;p;){
            for(j=1,c=0;(p&j)==0;j=(j<<1),++c);
            t=pre[c][t];
            p=(p&(p-1));
        }
        g<<t<<'\n';
    }
    return 0;
}