View Code of Problem 86

#include <cstdio>
#include <iostream>
#include <cmath>
using namespace std;

int main(){
	int a,n;
	cin>>a>>n;
	int sum=0;
	for(int i=1;i<=n;i++){
		for(int j=0;j<i;j++){
			sum+=pow(10,j)*a;
		}
	}
	cout<<sum;
	return 0;

}