Cod sursa(job #1179439)

Utilizator lucian.okapiNestian Lucian-Dan lucian.okapi Data 28 aprilie 2014 18:43:24
Problema Ridicare la putere in timp logaritmic Scor 10
Compilator cpp Status done
Runda Arhiva educationala Marime 0.43 kb
#include <iostream>
#include <fstream>

using namespace std;

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

int PutereLogaritmic(int x, int n)
{
	int p = 1 ;
	while (n > 0)
	{
		if (n & 1) // n este impar
		{
			p *= x;
			n-- ;
		}
		x = x * x ;
		n >>= 1 ; // sau n = n / 2
	}
	return p ;
}
int main()
{
    int x;int n;
    fin>>x>>n;
    fout<<PutereLogaritmic(x,n)%1999999973;

    return 0;
}