View Code of Problem 86

#include<stdio.h>
int main(){
	int sum=0,i,m,n,u,k=3;
	scanf("%d%d",&m,&n);
	u=m;
	for(i=0;i<n;i++){
        sum+=m;
		m*=10;
		k+=sum;
	}
	printf("%d",k-u);
	return 0;
}