from hashlib import sha256

# the seed here is only an example.
# The seed for the lottery (of Nervos CKB Minning Competition between 6/15 and 6/28) will be the block hash of the block of height N.
# Here is the sha256 hash of the sentence that contains the information of N:0x24f7501665d4f59b7f65c0853f8dd2a68fe528d345ffe63721f391eec711c190
seed = "0x08e94db8e9f6bd60152a0d7e54bc4a6f937f3a50af47bc08154787d8fb90292f"

# This is the number of the participants in total.
# The number here should be replaced with the actual number after the competition conclude.
participantNumber = 1000

# init lottery and result
result = []
hashed = sha256(seed).hexdigest()
lottery = int(int(hashed,16) % participantNumber)
result.append(lottery)

# loop to draw lottery
for i in range(64):
    while lottery in result:
        hashed = sha256(hashed).hexdigest()
        lottery = int(int(hashed,16) % participantNumber)
    result.append(lottery)

# sort the result
result.sort()

# The result printed here will be a list of numbers, which indicates the lottery winners according to their rank upon the competition ending.
# The list that contains all the participants' address will be disclosed after the competition is finished.
print(result)