Master_Numbers

using System;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
            var n = int.Parse(Console.ReadLine());

            for (int i = 1; i <= n; i++)
            {
                DivBySeven(i);
                Even(i);
                Palindrom(i);
                if (Palindrom(i) && DivBySeven(i) &&Even(i))
                {
                    Console.WriteLine(i);
                }
            }
        }
        public static bool Palindrom(int i)
        {
            var temp = 0;
            var digit = 0;
            var check = false;
            var res = i;
            //
            while (i > 0)
            {
                digit = i % 10;
                temp = temp * 10 + digit;
                i = i / 10;
            }
            if (res == temp)
            {
                check = true;
            }

            return check;
        }
        public static bool Even(int i)
        {
            var temp = 0;
            var check = false;
            var res = i;
            while (i > 0)
            {
                temp = i % 10;
                if (temp % 2 == 0)
                {
                    check = true;
                    break;
                }
                i /= 10;
            }

            return check;
        }
        public static bool DivBySeven(int i)
        {
            var temp = 0;
            var sum = 0;
            var res = i;
            var ch = false;
            while (i>0)
            {
                temp = i % 10;
                sum += temp;
                i /= 10;
            }
            if (sum % 7 == 0)
            {
                ch = true;
            }
            return ch;
        }

        private static void GeometryCalc()
        {
            var type = Console.ReadLine().ToLower();
            //
            string[] arr = { "triangle", "square", "rectangle", "circle" };
            for (int i = 0; i < arr.Length; i++)
            {
                if (type == arr[0])
                {
                    var a = double.Parse(Console.ReadLine());
                    var h = double.Parse(Console.ReadLine());
                    var prt = Triangle(a, h);
                    Console.WriteLine($"{prt:f2}");
                    break;
                }
                else if (type == arr[1])
                {
                    var a = double.Parse(Console.ReadLine());
                    var prt = Square(a);
                    Console.WriteLine($"{prt:f2}");
                    break;
                }
                else if (type == arr[2])
                {
                    var a = double.Parse(Console.ReadLine());
                    var b = double.Parse(Console.ReadLine());
                    var prt = Rectangle(a, b);
                    Console.WriteLine($"{prt:f2}");
                    break;
                }
                else if (type == arr[3])
                {
                    var r = double.Parse(Console.ReadLine());
                    var prt = Circle(r);
                    Console.WriteLine($"{prt:f2}");
                    break;
                }
            }
        }
        public static double Circle(double r)
        {
            var area = Math.PI * Math.Pow(r, 2);
            return area;
        }
        public static double Square(double a)
        {
            var area = a * a;
            return area;
        }
        public static double Rectangle(double a, double b)
        {
            var area = a * b;
            return area;
        }
        public static double Triangle(double a, double h)
        {
            var area = a*h/2;
            return area;
        }
        private static void CubeProperty()
        {
            double n = double.Parse(Console.ReadLine());
            string pro = Console.ReadLine();
            //
            if (pro == "face")
            {
                var prt = Face(n);
                Console.WriteLine($"{prt:f2}");
            }
            else if (pro == "space")
            {
                var prt = Space(n);
                Console.WriteLine($"{prt:f2}");
            }
            else if (pro == "volume")
            {
                Console.WriteLine($"{Volume(n):f2}");
            }
            else if (pro == "area")
            {
                var prt = Surface(n);
                Console.WriteLine($"{prt:f2}");

            }
        }
        public static double Space(double n)
        {
            var calc = 3 * Math.Pow(n, 2);
            var prt = Math.Sqrt(calc);
            return prt;

        }
        public static double Face(double n)
        {
            var calc = 2 * Math.Pow(n, 2);
            var prt = Math.Sqrt(calc);
            return prt;

        }
        public static double Volume(double n)
        {
            var volu = Math.Pow(n, 3);
            return volu;
        }
        public static double Surface(double n)
        {
            var face = 6*Math.Pow(n,2);
            return face;
        }
        private static void CenterPoints()
        {
            int x1 = int.Parse(Console.ReadLine());
            int y1 = int.Parse(Console.ReadLine());
            int x2 = int.Parse(Console.ReadLine());
            int y2 = int.Parse(Console.ReadLine());
            //
            Check(x1, y1, x2, y2);
        }
        public static void Check(int x1, int y1, int x2, int y2)
        {
            var xDist = 0;
            var yDist = 0;
            var x = 0;
            var y = 0;
            if (x1 >= x2)
            {
                xDist = x1 - x2;
                x = x2;
            }
            else if (x1 < x2)
            {
                xDist = x2 - x1;
                x = x1;
            }
            if (y1 >= y2)
            {
                yDist = y1 - y2;
                y = y2;
            }
            else if (y1 < y2)
            {
                yDist = y2 - y1;
                y = y1;
            }
            Console.WriteLine($"({x}, {y})");
        }
        public static void Print(int num)
        {
            string prt = "";
            string[] digitsWord = { "zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine" };
            prt = digitsWord[LastDigit(num)];
            Console.WriteLine(prt);
        }
        public static int LastDigit(int num)
        {
            int last = num % 10;
            return last;

        }
        private static void Gretaer()
        {
            int a = int.Parse(Console.ReadLine());
            int b = int.Parse(Console.ReadLine());
            int c = int.Parse(Console.ReadLine());
            //
            var greatest = 0;
            if (Max(a, b) > c)
            {
                greatest = Max(a, b);
            }
            else
            {
                greatest = c;
            }
            Console.WriteLine(greatest);
        }
        public static int Max(int a, int b)
        {
            int greater = 0;
            if (a>b)
            {
                greater = a;
            }
            else
            {
                greater = b;
            }
            return greater;
        }
        public static void Greeting(string name)
        {
            Console.WriteLine($"Hello, {name}!");
        }
    }
}