#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
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