OP says:
Quantity: 50 billion
Algorithm: Scrypt
Time per block: 3 minutes (2400 blocks)
Block reward: 10 000 SMLY (halved after 7 years)
50% premine, used for student rewards
Annual reward targets: equal for students and miners
So, the premine should be 25 billion?
But coinmarketcap
http://coinmarketcap.com/currencies/smileycoin/ says:
Available supply: 24,952,850,000 SMLY
So... the premine hasn't finished yet? Much confuse.