#include <iostream>
 
unsigned factorial(int n)
{
    if (n == 1) return 1;
    return n * factorial(n-1);
}
 
unsigned combinationsWithRepetition(int n, int k)
{
    return factorial(n + k - 1) / (factorial(k) * factorial(n - 1));
}
 
unsigned yourProblem(unsigned numberOfNumbers, unsigned result)
{
    return combinationsWithRepetition(numberOfNumbers, result - numberOfNumbers);
}
 
int main()
{
    std::cout << yourProblem(4, 5) << std::endl;
    std::cout << yourProblem(4, 6) << std::endl;
    return 0;
}

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