Function foo

    line 45
    max(0, (D - C))
    O(n)
      line 30
      max(0, (B - A)) + max(0, (B - A))
      O(n)

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