import java.util.Optional;
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        try (Scanner in = new Scanner(System.in)) {
            int de = in.nextInt();
            int ab = in.nextInt();
            // d
            // e
            int ac = in.nextInt();

            boolean res = false;
            for (int bd = 1; bd <= 100; bd++) {
                for (int ec = 1; ec <= 100; ec++) {
                    if (bd + de + ec >= ab + ac) {
                        break;
                    }

                    Optional<Double> cos_dba = cosine_formula(ac, ab, bd + de + ec);
                    Optional<Double> cos_eca = cosine_formula(ab, ac, bd + de + ec);
                    if (cos_dba.isEmpty() || cos_eca.isEmpty()) {
                        continue;
                    }
                    double dba = Math.acos(cos_dba.get().doubleValue());
                    double eca = Math.acos(cos_eca.get().doubleValue());

                    double ad = Math.sqrt(cosine_formula2(ab, bd, dba));
                    double ae = Math.sqrt(cosine_formula2(ac, ec, eca));

                    Optional<Double> cos_bad = cosine_formula(bd, ab, ad);
                    Optional<Double> cos_cae = cosine_formula(ec, ac, ae);
                    if (cos_bad.isEmpty() || cos_cae.isEmpty()) {
                        continue;
                    }
                    double bad = Math.acos(cos_bad.get().doubleValue());
                    double cae = Math.acos(cos_cae.get().doubleValue());

//                    Utils.debug(de, ab, ac, bd, ec, dba, eca, ad, ae, bad, cae, Math.abs(bad - cae) < 1e-3);
                    if (Math.abs(bad - cae) < 1e-3) {
                        res = true;
                    }
                }
            }
            System.out.println(res ? "Yes" : "No");
        }
    }

    private static final Optional<Double> cosine_formula(double a, double b, double c) {
        double cos = (b * b + c * c - a * a) / (2.0d * b * c);
        if (Math.abs(cos) > 1.0d) {
            return Optional.empty();
        }
        return Optional.of(cos);
    }

    private static final double cosine_formula2(double b, double c, double cab) {
        return b * b + c * c - 2.0 * b * c * Math.cos(cab);
    }
}