View Code of Problem 86

#include<bits/stdc++.h>
using namespace std;




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

	return 0;
}