use std::collections::HashSet;
use std::io::*;
fn gcd(a: u64, b: u64) -> u64 {
    if b == 0 {
        return a;
    }
    gcd(b, a % b)
}

fn rec(x: u64, a: u64, b: u64, c: u64, st: &mut HashSet<u64>) {
    if x >= a * b * c || st.contains(&x) {
        return;
    }
    st.insert(x);
    rec(x + a, a, b, c, st);
    rec(x + b, a, b, c, st);
    rec(x + c, a, b, c, st);
}

fn main() {
    let mut s: String = String::new();
    std::io::stdin().read_to_string(&mut s).ok();
    let mut itr = s.trim().split_whitespace();
    let a: u64 = itr.next().unwrap().parse().unwrap();
    let b: u64 = itr.next().unwrap().parse().unwrap();
    let c: u64 = itr.next().unwrap().parse().unwrap();
    if gcd(a, gcd(b, c)) != 1 {
        println!("INF");
    } else {
        let mut st = HashSet::<u64>::new();
        rec(0, a, b, c, &mut st);
        println!("{}", a * b * c - st.len() as u64);
    }
}