Fast search and replace some nibble in int [c; microoptimisation]?

This seemed like a fun question, so I wrote a solution without looking at other answers. This appears to be about 4.9x as fast on my system. On my system, it's also slightly faster than DigitalRoss's solution (~25% faster).

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.