Function foo

    line 8
    max(0, (A - B))
    O(n)
      line 17
      max(0, (A - B)) + max(0, (A - B))
      O(n)

Total Bound: max(0, (A - B)) + max(0, (A - B)) + max(0, (A - B))
Total Complexity: O(n)