advent-of-code/12021/06/06_newer.awk

BEGIN{ RS = ","; ngen=256 }

{ c[$1]++ }

END{
	for(g=1;g<=ngen;g++){
		for(i=0;i<=8;i++) nc[i] = c[(i+1)%9]
		nc[6] += c[0]
		for(i in nc) c[i] = nc[i]
	}
	for(i in c) count+=c[i]
	print count
}