Cod sursa(job #819765)

Utilizator crisandancrisan dan crisandan Data 19 noiembrie 2012 18:03:48
Problema Ridicare la putere in timp logaritmic Scor 10
Compilator cpp Status done
Runda Arhiva educationala Marime 0.39 kb
#include <fstream>
using namespace std;
//p-putere
//n-numar
//x-n initial
ifstream cin("lgput.in");
ofstream cout("lgput.out");
long puterelogaritmica(long &x, long &p)
{
	long n=1;
	long m=1999999973;
	while(p>0)
	{
		if(p%2!=0)
		{
			n=n*x;
			n=n%m;
			p--;
		}
		x=x*x;
		p=p/2;
	}
	return n;
}

int main(){
	long x, p;
	cin>>x>>p;
	cout<<puterelogaritmica(x, p);
}