Largest number ​

Given an integer n, return the largest number that contains exactly n digits.

Example ​

For n = 2, the output should be solution(n) = 99.

Input ​

integer n

Guaranteed constraints: 1 ≤ n ≤ 9.

Output ​

The largest integer of length n.

Solution ​

fn solution(n: i32) -> i32 {
    10_i32.pow(n as u32) - 1
}

fn solution(n: i32) -> i32 {
    10_i32.pow(n as u32) - 1
}