[140913]Power

Power

#include <iostream>
typedef unsigned int uint;
using std::cin;
using std::cout;
 
 
uint power(uint a, uint n){
	if(a == 1)
		return 1;
	if(a != 0 && n == 0)
		return 1;
	if(a == 0 && n == 0)
		throw "invalid argument";

	uint t, r;
	t = a;
	r = 1;
	while(n > 0){
		if(n % 2 == 1)
			r *= t;
		n /= 2;
		t *= t;
	}

	return r;
}
 
 
int main(int argc, char *argv[]){
	uint a, n;
	cin >> a >> n;
	cout << power(a, n) << '\n';
	return 0;
}