Codility: MaxProfit Solution

Approach

Keep track of the min day

Implementation

1function solution(A) {
2  let max = -Infinity
3  let min = A[0]
4  for (let i = 1; i < A.length; i++) {
5    max = Math.max(max, A[i] - min)
6    if (min > A[i]) {
7      min = A[i]
8    }
9  }
10  return max > 0 ? max : 0
11}