ascii size is known(128), so u can get the occur-times and put them at their natural-locations in a vector, so that getting the occur-times data for every character only takes constant-level of time.

noooo, it's substraction, he wants to control the size of the sum..
because when 3 int params are given, they must be in the correct range, so subtraction of any two of them will not cause a overflow.
That should be some kind of tech worthy to remember.

你的猫很大程度缓解了我的就业压力，感谢🙏！

Hey man, do u know how to change my head sculpture image? Is it changable? Or it's auto-changed by the level's rising? Thank u so much