有1、2、3、4個數字,能組成多少個互不相同且無重複數字的三位數?都是多少?
num = [1,2,3,4]
for a in num:
for b in num:
for c in num:
if a != b and a != c and b != c :
print(a,b,c)
num = [1,2,3,4]
for a in num:
for b in num:
for c in num:
if a != b and a != c and b != c :
print(a,b,c)