use std::io::Read; fn read() -> T { let token: String = std::io::stdin() .bytes() .map(|c| c.ok().unwrap() as char) .skip_while(|c| c.is_whitespace()) .take_while(|c| !c.is_whitespace()) .collect(); token.parse().ok().unwrap() } fn main() { let a: i32 = read(); let m = 10 * 60 + a * 1000 / (100 * 1000 / 60); println!("{:02}:{:02}", m / 60, m % 60); }