MotionBootcamp -1

function solve(arr) {

    let number = arr.shift();
    let length = number.split(' ').length;
    let k = arr.shift();

    function factorialize(num) {
        if (num < 0)
            return -1;
        else if (num == 0)
            return 1;
        else {
            return (num * factorialize(num - 1));
        }
    }
    let result = factorialize(length);
    let result2 = factorialize(length - k);
    console.log(result/result2);
}

solve([ '234 232 230', '2', '' ]);