db = False import fileinput state = [] lines = [l for l in fileinput.input()] assert(len(lines) > 0) assert(len(lines[0]) > 0) rawState = list(map(int, lines[0].split(','))) state = [0 for i in range(9)] for s in rawState: state[s] += 1 days = 256 day = 0 if db: print(day, ",".join(map(str, state))) for day in range(1, days+1): nextState = [0 for i in range(9)] for i, s in enumerate(state): if i == 0: nextState[6] = s nextState[8] = s else: nextState[i-1] += s state = nextState.copy() if db: print(day, ",".join(map(str, state))) print('===') print(sum(state))