// Check whether it is possible to build a triangle with the sides of length a, b, c.

// The program should input positive integers a, b, c and print “Yes” or “No” accordingly.

​

using System;

using System.Diagnostics;

public class Program

{

    public static int InputInt(string prompt)

    {

        Console.Write("Enter " + prompt + ":");

        return Convert.ToInt32(Console.ReadLine());

    }

    public static void Main()

    {

        // input data

        int a = InputInt("length of side a");

        int b = InputInt("length of side b");

        int c = InputInt("length of side c");

        Trace.Assert(a > 0 && b > 0 && c > 0);

​

        // output result

        if (a + b > c && a + c > b && b + c > a){

            Console.Write("Yes");

        }else{

            Console.Write("No");

        }

​

    }

}