Ready for LeetCode

On LeetCode you fill in one function. LeetCode calls it with the input and checks what you return. No reading input, no console.log.

The comments above it (@param {number[]} prices) just tell you the types: number[] means an array of numbers.

1/**
2 * @param {number[]} prices
3 * @return {number}
4 */
5var maxProfit = function (prices) {
6  // your code here
7};