View Code of Problem 86

#include<iostream>
#include<vector>
#include<cstring>
#include<cstdio>
#include<algorithm>
#include<cmath>
#include<string>
using namespace std;

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