def xunhuan_sum(x,y):
sum = 0
num = x
while x <= y:
sum += x
x += 1
return sum
print(xunhuan_sum(1,100)）
def digui_sum(x,y):
sum = 0
if y == 1:
sum = y
else:
sum = xunhuan_sum(x,y-1) + y
print((sum))
return sum
digui_sum(1,100)
# Enter a code
s1 = set([1, 2, 3, 4, 5])
s2 = set([1, 2, 3, 4, 5, 6, 7, 8, 9])
if s1.isdisjoint(s2):
print('沒有重復元素')
if s1.isdisjoint(s2) == False:
for item in s1:
if item in s2:
print(item)
