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Even Dividing

This is my updated entry for the Two steps back contest, where you needed to only use the vanilla editor. The original version is here: https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=3283545407

It's a No-Element-ish map with simple layout yet unusual solution that is entirely logical if you have been good at physics at school.

Difficulty:
Puzzle: Easy. Having played No-Elements helps.
Execution: Easy.

Tips:
You can take your time while juggling between portals.
Air-strafe sideways with A,D.
Jump from ledges to make strafing even easier.

Physical background:
If these laws still apply, a body with zero potential energy flying at a 45 degree angle has half of its energy in its horizontal velocity component. You could also say that the horizontal velocity is by the Pythagorean theorem 1/sqrt(2) times the total velocity. Since energy is proportional to velocity squared, the corresponing energy is half the total one.

There is one secret.

Solution:
https://youtu.be/nWvOOiCiiQI

Similar map:
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=3263186323

Thanks to Snazz and Didokiller, whose feedback on that map made me create this one!