#include<stdio.h>
int fun(int n,int a)
{
	int i,j,sum,sum2=0;
	for(i=1;i<=n;i++)
	{
		sum=0;
		for(j=0;j<i;j++)
		{
			sum=sum*10+a;
		}
		sum2+=sum;
	}
	return sum2;
}
int main()
{
	int i,j,n,a;
	scanf("%d %d",&n,&a);
	printf("%d",fun(n,a));
}