原题传送门

1. 题目描述

2. Solution

import sys

if sys.platform != "linux":
    file_in = open("input/HJ55.txt")
    sys.stdin = file_in

for line in sys.stdin:
    n = int(line.strip())
    cnt = 0
    for i in range(1, n + 1):
        if i % 7 == 0 or '7' in str(i):
            cnt += 1
    print(cnt)

标签：cnt,stdin,sys,牛客,file,HJ55,机试,line
来源： https://www.cnblogs.com/junstat/p/16172581.html