s - 指数运算-快速幂实现

#include<stdio.h>
int main()
{
	unsigned long int a, b;
	while(~scanf("%lu%lu", &a , &b))
	{
		unsigned long int ans = 1,base = a;
	while(b)
	{
		if(b&1)
		{
			ans*=base;
		}
		base*=base;
		b>>=1;
	}
	printf("%lu\n",ans);
	}
	
	return 0;
}#include<stdio.h>
int main()
{
	unsigned