View Code of Problem 86

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

}