#include<iostream.h>

int power(int a, int b)
{
    if(b==0)
        return 1;
    if(b%2==0)
        return power(a, b/2) * power(a, b/2);
    if(b%2!=0)
        return power(a, b/2) * power(a, b/2) * a;
}

int main()
{
    int n, k;
    cin>>n>>k;
    int a, b;
    a=power(k, n-1) * (k-1);
    b=power(2, n-1);
    cout<<a-b+n<<endl;
    return 0;
}
I think that the answer of this problem is
(k-1)*k^(n-1)-2^(n-1)+n why it is wrong i don't understand.

Because it is not working!!!!!!!!!!!!!!!!!!!!!

yes it doesn't! =)

Don't use alien wrong solution!