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import random
import matplotlib.pyplot as plt
gates = ['coat', 'coat', 'car']
def not_change(N=1000):
win = 0
for i in range(N):
random.shuffle(gates)
# print(gates)
chosed = random.randint(0, 2)
print('chosed {}({})'.format(chosed, gates))
unchosed_coat = random.choice([i for i in range(3) if i != chosed and gates[i] != 'car'])
print('{} is a coat, change or not'.format(unchosed_coat))
final_chose = chosed
if gates[final_chose] == 'car':
win += 1
print('not change, win')
else:
print('not change, lose')
return win
def change(N=1000):
win = 0
for i in range(N):
random.shuffle(gates)
# print(gates)
chosed = random.randint(0, 2)
print('chosed {}({})'.format(chosed, gates))
unchosed_coat = random.choice([i for i in range(3) if i != chosed and gates[i] != 'car'])
print('{} is a coat, change or not'.format(unchosed_coat))
for i in range(3):
if i != chosed and i != unchosed_coat:
final_chose = i
if gates[final_chose] == 'car':
print('change, win')
win += 1
else:
print('change, lose')
return win
if __name__ == '__main__':
# N = 100000
# # print('not change, win {}/{}'.format(not_change(N), N))
# print('change, win {}/{}'.format(change(N), N))
not_change_rates = []
change_rates = []
for n in [10, 100, 1000, 10000, 100000, 100000]:
not_change_rates.append(not_change(n) / n)
change_rates.append(change(n) / n)
plt.plot(range(6), not_change_rates, range(6), change_rates)
plt.show()
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