Module b

ABC 387 B - 9x9 Sum

refs: https://atcoder.jp/contests/abc387/tasks/abc387_b

use proconio::input;

fn main() {
    input! {
        x: usize,
    }

    let mut ans = 0;

    for i in 1..=9 {
        for j in 1..=9 {
            if i * j != x {
                ans += i * j;
            }
        }
    }

    println!("{ans}");
}