I think any algorithm (even the usual one with division) would take hundreds of lines of comments if written in this style. There are thirty lines just to expla

I think any algorithm (even the usual one with division) would take hundreds of lines of comments if written in this style. There are thirty lines just to explain -x % x. Myself, I'd rather see uint64_t t = -s % s; // = (2^64 - s) % s = 2^64 % s