题解 | #挑7#
import sys
for line in sys.stdin:
n=int(line.strip())
num_count=0
for i in range(7, n+1):
if i%7==0:
num_count+=1
elif '7' in str(i):
num_count+=1
print(num_count)
import sys
for line in sys.stdin:
n=int(line.strip())
num_count=0
for i in range(7, n+1):
if i%7==0:
num_count+=1
elif '7' in str(i):
num_count+=1
print(num_count)
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