But you do realize that they also weed out effective engineers who aren’t good at pointless puzzles, and that leetcode.com and dozens of other sources exist ent

But you do realize that they also weed out effective engineers who aren’t good at pointless puzzles, and that leetcode.com and dozens of other sources exist entirely to help people beat this system, right? They don’t measure useful skills. They’re a game that some people are good at beating and others aren’t, and whether that person is an effective engineer is largely unrelated to their skill at that game.