# include <iostream>

using namespace std;

// x! = x * (x-1) * (x-2) * .. * 1
// 5! = 5 * 4 * 3 * 2 * 1
long factorial(int x){
    // implementation.
    for (int i = 1; i <= x; i++) {
        cout <<
        // gera eitthvað við i
    }
}

int pascal(int a, int b){
    return factorial(a) / (factorial(b) * factorial(a - b));
}

int main(){
    cout << "Type in the number" << endl;
    cin >> a;

    // implementation
}