Problem:
Score : 300 points

Problem Statement

How many integer sequences A_1,A_2,\ldots,A_N of length N satisfy all of the following conditions?

0 \leq A_i \leq 9

There exists some i such that A_i=0 holds.

There exists some i such that A_i=9 holds.

The answer can be very large, so output it modulo 10^9 + 7.

Constraints

1 \leq N \leq 10^6

N is an integer.

Input

Input is given from Standard Input in the following format:

N

Output

Print the answer modulo 10^9 + 7.

Sample Input 1

2

Sample Output 1

2

Two sequences \{0,9\} and \{9,0\} satisfy all conditions.

Sample Input 2

1

Sample Output 2

0

Sample Input 3

869121

Sample Output 3

2511445

Solution in Rust (1.42.0) (judge verdict: Accepted)

use proconio::input;
     
fn main() {
    input! {
        n: i64,
    }
 
    let div = 1000000007;
    if n == 1 {
        println!("0");
    } else {
        println!("{}", expo(n, div));
    }
}
 
fn expo(time: i64, div: i64) -> i64 {
    let mut ans10 = 1;
    let mut ans9  = 1;
    let mut ans8  = 1;
    for _ in 0..time {
        ans10 *= 10;
        ans10 %= div;
        ans9 *= 9;
        ans9 %= div;
        ans8 *= 8;
        ans8 %= div;
    }
    let mut ans = (ans10 - ans9 - ans9 + ans8) % div;
    if ans < 0 { ans += 1000000007; }
    ans
}