View Code of Problem 86

#include<stdio.h>
#include<string.h>
#include<math.h>
#include<algorithm>
using namespace std;


int main()
{
    int a,n;
    long long sum = 0;
    long long temp = 0;
    long long num[50];
    scanf("%d %d",&a,&n);
    num[0] = a;
    for(int i =1;i<n;i++)
    {
        num[i] = a * pow(10,i) + num[i-1];
    }
    for(int i = 0;i<n;i++)
    {
        sum = sum + num[i];
    }
    printf("%lld\n",sum);
    return 0;
}