#include<iostream>
#include<algorithm>
#include<cmath>
using namespace std;
unsigned long long p=0,a=0,n=0,A=0,B=0;
int main(){
	cin>>a>>n;
	p=pow(a,n);
	while(p!=0){
		unsigned long long t=p%10;
		if(t%2==1) A++;
		else B++;
		p=p/10;
	}
	int anssumcnt=A-B;
	cout<<anssumcnt<<endl;
	return 0;
}

只有#1,2,5ac其他wa，求大佬改正