2019-12-21 数字组合
2019-12-21 本文已影响0人
Joyner2018
import os
import sys
import time
# begin = time.time()
total = 0
for i in range(1,5):
for j in range(1,5):
for k in range(1,5):
if i!=j and j!=k and k!=i:
total+=1
print(total)
# print(time.time()-begin)
import itertools
# begin = time.time()
sum2 = 0
a=[1,2,3,4]
for i in itertools.permutations(a,3):
# print(i)
sum2+=1
print(sum2)
# print(time.time()-begin)
