Remove Skill Point except in Multiple of 3

[Orchard]

I think and hope this is relatively simple solution and its just hiding behind my nose.
What I'm trying to do is to just give players one skill point every 3 levels (So level 3,6,9,12,15,etc). I'm currently using the following trigger but its incredibly clunky, hard to scale, and would probably cause too much lag if I ever scaled it up to level 99 or 300 or something.

• Skill Manager
  • Events
    • Unit - A unit Gains a level
  • Conditions
    • And - All (Conditions) are true
      • Conditions
        • (Hero level of (Triggering unit)) Not equal to 3
        • (Hero level of (Triggering unit)) Not equal to 6
        • (Hero level of (Triggering unit)) Not equal to 9
        • (Hero level of (Triggering unit)) Not equal to 12
        • (Hero level of (Triggering unit)) Not equal to 15
        • (Hero level of (Triggering unit)) Not equal to 18
        • (Hero level of (Triggering unit)) Not equal to 21
        • (Hero level of (Triggering unit)) Not equal to 24
        • (Hero level of (Triggering unit)) Not equal to 27
        • (Hero level of (Triggering unit)) Not equal to 30
  • Actions
    • Hero - Modify unspent skill points of (Triggering unit): Subtract 1 points

So what I'm trying to do is either get some simple trigger or jass script that just checks whether the hero's level is a multiple of 3. Thanks in advanced.

 

[Marcelo Hossomi]

I think there's a math function called modulo, used for integers.

This function will calculate the remainder of a division. So, you get the hero level and divide by 3. If the remainder is 0, so it's a multiple o 3, and do whatever you want

 

[Orchard]

Solution successful! I send <3s and more importantly my +rep (unfortunately only 0 points, but y'know I tried.)