011314_challenge_148_easy_combination_lock

gistfile1.js

var input = [5, 1, 2, 3], 
	digit_count = input.shift()

digit_count * 4 + input[0] * 2 - input[1] * 2 + input[2]

var input = [5, 1, 2, 3], 
    digit_count = input.shift()


function rotateTwice(count) {
    count += digit_count * 2 + input[0];
    return count;
}

function spinCounterClockwise(count) {
    count += digit_count + input[0] + digit_count - input[1];
    return count;
}

function goToLastDigit(count) {
    count += input[2] - input[1];
    return count;
}

function openLock(count) {
    return goToLastDigit(spinCounterClockwise(rotateTwice(count)));
}

openLock(0);