import java.util.Scanner;

public class Main {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        long a = in.nextLong();
        long b = in.nextLong();
        long c = in.nextLong();

        System.out.println( Math.sqrt(a) + Math.sqrt(b) >= Math.sqrt(c) ? "No" : "Yes");
    }
}