fn main(){
    let mut sc = Scanner::new();
    while let Ok(a) = sc.wrapped() {
        let b = sc.next();
        let c = sc.next();
        let ans = if is_kdmt(a,b,c,100000000000) {
            String::from("INF")
        } else {
            let mut cnt = 0;
            for p in 1..100000 {
                if is_kdmt(a,b,c,p) {
                    cnt += 1;
                }
            }
            cnt.to_string()
        };
        println!("{}", ans);
    }
}

fn is_kdmt(x: i64, y: i64, z: i64, p: i64) -> bool {
    let x = x % p;
    let y = y % p;
    let z = z % p;
    return x != y && y != z && z != x &&
        ((y < x && y < z) || (y > x && y > z));
}

// Scanner

#[allow(dead_code)]
struct Scanner {
    token_buffer : Vec<String>,
    index : usize,
}

#[allow(dead_code)]
impl Scanner {
    fn new() -> Scanner{
        Scanner { token_buffer: vec![], index: 0 }
    }

    fn wrapped<T>(& mut self) -> Result<T,&str> where T: std::str::FromStr {
        let s = try!(self.fetch_token());
        let t = try!(s.parse::<T>().map_err(|_| "Parse error"));
        Ok(t)
    }
    fn next<T>(& mut self) -> T where T: std::str::FromStr {
        self.wrapped::<T>().unwrap()
    }
    fn ni(& mut self) -> i32 {
        self.next::<i32>()
    }

    fn fetch_token(&mut self) -> Result<&String,&str> {
        while self.index >= self.token_buffer.len() {
            let mut st = String::new();
            while st.trim() == "" {
                match std::io::stdin().read_line(&mut st) {
                    Ok(l) if l > 0 => continue,
                    Ok(_)  => return Err("End of file"),
                    Err(_) => return Err("Failed to read line"),
                }
            }
            self.token_buffer = st.split_whitespace()
                .map(|x| x.to_string())
                .collect();
            self.index = 0;
        }

        self.index += 1;
        Ok(&self.token_buffer[self.index - 1])
    }
}