Cod sursa(job #1319240)

Utilizator asavoaeigeoAsavoaei Georgiana asavoaeigeo Data 16 ianuarie 2015 20:04:22
Problema Ridicare la putere in timp logaritmic Scor 10
Compilator cpp Status done
Runda Arhiva educationala Marime 0.51 kb
#include <fstream>

using namespace std;
ifstream fin("lgput.in");
ofstream fout("lgput.out");
const int m = 1999999973;
double PutereLogaritmic(double x,int n)
{
    double p=1;
    while(n>0)
    {
        if((n&1)==1) //n este impar
              {
                  p=p*x;
                  n--;
              }
       x=x*x;
       n=n>>1;       // sau n=n/2;
    }
    return p;
}

int main()
{
    int n,p,a;
    fin>>n>>p;
    a=PutereLogaritmic(n,p);
    fout<<a%m;
    return 0;
}