#nullable enable

#region
var (_input, _iter) = (Array.Empty<string>(), 0);
T I<T>() where T : IParsable<T>
{
    while (_iter >= _input.Length) (_input, _iter) = (Console.ReadLine()!.Trim().Split(' '), 0);
    return T.Parse(_input[_iter++], null);
}
#endregion

var a = I<int>();
var b = I<int>();
var c = I<int>();

var l1 = Math.Min(Math.Min(a, b), c);
var l3 = Math.Max(Math.Max(a, b), c);
var l2 = a + b + c - l1 - l3;
var ans = l1 + l2 > l3;
Console.WriteLine(ans ? "Yes" : "No");