View Code of Problem 86

# include<stdio.h>
# include<math.h>
int main(void)
{
  int a,b,i,s[100]={0},sum = 0;
  scanf("%d%d",&a,&b);
  for(i=1;i<=b;++i)
  {
    s[i] = s[i-1] + a*pow(10,i-1);
  }
  for(i=1;i<=b;++i)
  {
    sum = sum + s[i];
  }
  printf("%d",sum);
  return 0;
}