Cod sursa(job #2391625)

Utilizator Costy_Suruniuc Constantin Costy_ Data 29 martie 2019 08:35:29
Problema Ridicare la putere in timp logaritmic Scor 10
Compilator cpp-64 Status done
Runda Arhiva educationala Marime 0.52 kb
#include <iostream>
#include <fstream>
using namespace std;
long long exp(long long a, long long b)
{
	if (b == 0)
		return 1;
	if (b == 1)
		return a;
	if (b % 2 == 0)
	{
		return exp(a, b / 2) * exp(a, b / 2);
	}
	else if (b % 2 != 0)
	{
		return exp(a, (b - 1) / 2)*exp(a, (b - 1) / 2)*a;
	}
}


int main()
{
	fstream inFile;
	inFile.open("lgput.in");
	long long a, b;
	inFile >> a >> b;
	inFile.close();
	ofstream outFile;
	outFile.open("lgput.out");
	outFile << exp(a, b);
	outFile.close();
}