题解 | #挑7#
挑7
http://www.nowcoder.com/practice/ba241b85371c409ea01ac0aa1a8d957b
最简单的一题了吧
while True:
try:
num = int(input())
a = 0
for i in range(1, num + 1):
if i % 7 == 0 or str(7) in str(i):
a += 1
print(a)
except:
break
