题解 | #挑7#
挑7
http://www.nowcoder.com/practice/ba241b85371c409ea01ac0aa1a8d957b
#穷举即可，不得不说，Python在处理字符串还是简单暴力
while True:
try:
n = int(input())
count = 0
for i in range(1, n+1):
if ('7' in str(i))&nbs***bsp;(i % 7 == 0) :
count += 1
print(count)
except: break
查看2道真题和解析