I tried to import math to use Abs and Max. And I got funyy error: math is imported and is not used with undefined Max and Abs. Do anybody used import in Go when solving proglems?

• https://leetcode.com/problems/balanced-binary-tree/submissions/
• solved without package: https://gist.github.com/lbvf50mobile/90a227cc960e1d3486cc15eabdfdacbb#file-isbalanced-go-L14
  

UPD math.Max not simpe Max!