题解 | #挑7#
挑7
http://www.nowcoder.com/practice/ba241b85371c409ea01ac0aa1a8d957b
import sys
for line in sys.stdin:
n = int(line)
count = 0
for i in range(1, n + 1):
if '7' in str(i):
count += 1
continue
if i % 7 == 0:
count += 1
continue
print(count)
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