import random

GREEN = "GREEN"
RED = "RED"
BLACK = "BLACK"
slots = [GREEN] + [RED, BLACK] * 18

# bet constant k dollars each round and stop playing once my profit is k dollars.
TARGET_AMOUNT = 1
BET_AMOUNT = 1

def i_play_atmost_N_spins_each_day(N = 1000):
    net_amount = 0
    most_loss = 0 # expected bankroll. i.e i should expect this much to lose in the worst case.

    previous_outcome = RED
    i = 0
    for _ in range(1,N+1):
        i += 1
        outcome = random.choice(slots) # spin the roulette wheel.
        if(outcome == previous_outcome): # always bet on the previous outcome.
            net_amount += BET_AMOUNT
        else:
            net_amount -= BET_AMOUNT

        most_loss = min(most_loss, net_amount)

        if(net_amount == TARGET): # stop playing once I profit 1$
            break
        previous_outcome = outcome
        if(previous_outcome == GREEN):
            previous_outcome = RED

    return (i,most_loss,net_amount) # save a record of total_spins, most_negative_i_went, net_amount_at_the_end




spins_i_played_each_day = [] # maximum is N spins.
most_negative_i_went_each_day = []
net_amount_i_have_each_day = []

i_profited_these_many_days = 0
i_go_casino_these_many_days = 365

for _ in range(i_go_casino_these_many_days):
    total_spins_that_day, most_loss_that_day, net_amount_that_day = i_play_atmost_N_spins_each_day()

    if(net_amount_that_day == TARGET):
        i_profited_these_many_days += 1
    spins_i_played_each_day.append(total_spins_that_day)
    most_negative_i_went_each_day.append(most_loss_that_day)
    net_amount_i_have_each_day.append(net_amount_that_day)

print(i_profited_these_many_days/i_go_casino_these_many_days) # output: between 0.89 ~ 0.91
print(min(most_negative_i_went_each_day)) # output: between 80 ~ 140