#A. 土拨鼠的幸运数字2

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土拨鼠的幸运数字2

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题面翻译

【题目描述】愚蠢的土拨鼠喜欢数字,他将4和7视为幸运数字。如果一个数能由4与7组成,它就是幸运数字,只要能被幸运数字整除的也算幸运数字!现给定一个数字n,请输出1-n之间幸运数字的个数。 【输入格式】一个整数n(1<=n<=1000000) 【输出格式】一个整数, 表示1-n之间有多少幸运数字。

Samples

4
1
16
6

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Not Attended
Status
Done
Rule
Ledo
Problem
4
Start at
2024-5-26 15:45
End at
2024-5-26 16:25
Duration
0.7 hour(s)
Host
Partic.
2