View Code of Problem 86

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