#![allow(unused_imports)] use std::cmp::*; use std::collections::*; use std::io::Write; use std::ops::Bound::*; #[allow(unused_macros)] macro_rules! debug { ($($e:expr),*) => { #[cfg(debug_assertions)] $({ let (e, mut err) = (stringify!($e), std::io::stderr()); writeln!(err, "{} = {:?}", e, $e).unwrap() })* }; } fn main() { let a = read::(); if a == 1.0 { println!("A 1"); return; } if a < 1.0 { let a = (a * 1000.0).round() as i64; let lcm = 1000 * a / gcd(a, 1000); let b = lcm / a; let r = (b - 1) * 2 + lcm / 1000 - 1; println!("C {}", r); } else { assert!(false); let a = ((1.0 / a) * 1000.0).round() as i64; let lcm = 1000 * a / gcd(a, 1000); let b = lcm / a; let r = (b - 1) * 2 + lcm / 1000 - 1; println!("B {}", r); } } fn gcd(a: i64, b: i64) -> i64 { if b == 0 { return a; } gcd(b, a % b) } fn read() -> T { let mut s = String::new(); std::io::stdin().read_line(&mut s).ok(); s.trim().parse().ok().unwrap() } fn read_vec() -> Vec { read::() .split_whitespace() .map(|e| e.parse().ok().unwrap()) .collect() }