use proconio::{fastout, input};

#[fastout]
fn main() {
    input! {
        testcases: [(i8, i8, i8, i8)],
    }

    println!("{}", output(solve(testcases)));
}

fn solve(testcases: Vec<(i8, i8, i8, i8)>) -> Vec<bool> {
    testcases
        .into_iter()
        .map(|(a, b, c, _)| a != 0 && (b as i16).pow(2) - 3 * a as i16 * c as i16 > 0)
        .collect()
}

fn output(ans: Vec<bool>) -> String {
    ans.into_iter()
        .map(|x| if x { "Yes" } else { "No" })
        .collect::<Vec<_>>()
        .join("\n")
}