sum = 0
while True:
num = input('请输入一个整数,按回车键继续:')
if num !='#':
num = int(num)
if num % 5 != 0:
sum+=num
else:break
print('整数和={}'.format(sum))
indices = set([0, 7, 14, 18])
s = "i love China"
print("".join(c.upper() if i in indices else c for i, c in enumerate(s)))
I love China