题解 | #挑7#
挑7
https://www.nowcoder.com/practice/ba241b85371c409ea01ac0aa1a8d957b
import sys
count1 = 0
for line in sys.stdin:
a = line.strip()
for i in range(1,int(a)+1):
if i%7 == 0:
count1 +=1
continue
elif '7' in str(i):
count1 +=1
print(count1)
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