Codeforces Round 157 (Div. 2)
D
Little Elephant and Elections
Codeforces
未评级
原题
← CE →
翻译中…

There have recently been elections in the zoo. Overall there were $7$ main political parties: one of them is the Little Elephant Political Party, $6$ other parties have less catchy names.

翻译中…

Political parties find their number in the ballot highly important. Overall there are $*m*$ possible numbers: $1, 2, ..., *m*$. Each of these $7$ parties is going to be assigned in some way to exactly one number, at that, two distinct parties cannot receive the same number.

翻译中…

The Little Elephant Political Party members believe in the lucky digits $4$ and $7$. They want to evaluate their chances in the elections. For that, they need to find out, how many correct assignments are there, such that the number of lucky digits in the Little Elephant Political Party ballot number is strictly larger than the total number of lucky digits in the ballot numbers of 6 other parties.

翻译中…

Help the Little Elephant Political Party, calculate this number. As the answer can be rather large, print the remainder from dividing it by $1000000007$ $(10^{9} + 7)$.

翻译中…

Input

翻译中…

A single line contains a single positive integer $*m*$ $(7 ≤ *m* ≤ 10^{9})$ — the number of possible numbers in the ballot.

翻译中…

Output

翻译中…

In a single line print a single integer — the answer to the problem modulo $1000000007$ $(10^{9} + 7)$.

翻译中…

样例

Input #1
7
Output #1
0
InputCopy OutputCopy
Input #2
8
Output #2
1440
InputCopy OutputCopy
题目信息
题号
259D
时间限制
2 s
内存限制
256 MB

题面与样例版权归 Codeforces 及出题人所有;中文翻译由 AI 生成(CI 管线),如有出入请以原文为准。