#include <stdio.h>
#include<math.h>

int main()
{
    long long int a,b,x,sum=0;
	int t;
	scanf("%lld %lld",&a,&b);
	x=pow(a,b);
	while(x!=0)
	{
		t=x;
		x=x/10;
		t=t%10;
		sum+=t;
	}
	printf("%lld",sum);
	
}