题解 | #挑7#
挑7
http://www.nowcoder.com/practice/ba241b85371c409ea01ac0aa1a8d957b
while True:
try:
n = int(input())
res = []
for i in range(6,n+1):
if i%7 == 0:
res.append(i)
else:
for j in range(len(str(i))):
if str(i)[j] == '7' and i not in res:
res.append(i)
print(len(res))
except:
break
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