Cod sursa(job #2227621)

Utilizator AlexPascu007Pascu Ionut Alexandru AlexPascu007 Data 1 august 2018 11:13:10
Problema Ridicare la putere in timp logaritmic Scor 10
Compilator cpp Status done
Runda Arhiva educationala Marime 0.46 kb
#include <fstream>
using namespace std;
ifstream fin("lgput.in");
ofstream fout("lgput.out");
long long putere(long long a, long long b) {
	if (b<0)
		return putere(1/a,-b);
	else if (b==0)
		return 1;
	else if (b==1)
		return a;
	else if (b%2==0)
		return (putere(a*a, b/2))%1999999973;
	else if (b%2==1)
		return ((a%1999999973)*(putere(a*a, (b-1)/2))%1999999973)%1999999973;
}
long long n,p;
int main() {
	fin>>n>>p;
	fout<<putere(n,p);
	return 0;
}