题解 | #挑7#
挑7
http://www.nowcoder.com/practice/ba241b85371c409ea01ac0aa1a8d957b
while True:
try:
n = int(input())
c = 0
for i in range(1,n+1):
if i % 7 == 0:
c += 1
elif str(i).count('7') > 0 :
c += 1
print(c)
except:
break
