View Code of Problem 86

#include<bits/stdc++.h>
using namespace std;
int main(){
	int a,b,sum = 0,op = 0,flag = 0,t = 0;
	cin>>a>>b;
	for(int i = 1;i<=b;i++){
		t = a + flag;
		sum += t;
		op = t;
		flag = op * 10;
	}
	cout<<sum;
	return 0;
}