Problem:
Structured Programming

In programming languages like C/C++, a goto statement provides an unconditional jump from the "goto" to a labeled statement. For example, a statement "goto CHECK_NUM;" is executed, control of the program jumps to CHECK_NUM. Using these constructs, you can implement, for example, loops.

Note that use of goto statement is highly discouraged, because it is difficult to trace the control flow of a program which includes goto.

Write a program which does precisely the same thing as the following program (this example is wrtten in C++). Let's try to write the program without goto statements.

void call(int n){
int i = 1;
CHECK_NUM:
int x = i;
if ( x % 3 == 0 ){
cout << " " << i;
goto END_CHECK_NUM;
}
INCLUDE3:
if ( x % 10 == 3 ){
cout << " " << i;
goto END_CHECK_NUM;
}
x /= 10;
if ( x ) goto INCLUDE3;
END_CHECK_NUM:
if ( ++i <= n ) goto CHECK_NUM;

cout << endl;
}

Input

An integer n is given in a line.

Output

Print the output result of the above program for given integer n.

Constraints

3 ≤ n ≤ 10000

Sample Input

30

Sample Output

3 6 9 12 13 15 18 21 23 24 27 30

Put a single space character before each element.

Solution in C# (judge verdict: Accepted)

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ITP1_5_D
{
    class Program
    {
        static void Main(string[] args)
        {

            // 与えられた整数3≤n≤10000に対し以下を行う
            // ① 3からnの中に含まれる整数は3で割り切れるか？
            // ② 3からnの中に含まれる整数は3を含むか？
            // ③ ①または②に当てはまる整数を昇順に出力する

            int n1 = int.Parse(Console.ReadLine());

            int i = 0;

            while (true)
            {
                if (n1 < 3 || 10000 < n1)                       // nが3以下or10000以上の時 処理を終了する
                {
                    break;
                }

                else
                {
                    for (i = 1; i <= n1; i++)
                    {
                        int n2 = i;                             // int n2　1からn1までの整数が入る変数
                        if (n2 % 3 == 0)                        // n2が3で割り切れるとき、n2を表示させる
                        {
                            Console.Write(" " + n2);
                        }
                        else if (n2.ToString().Contains("3"))   //文字列n2に"3"が含まれるとき、n2を表示させる。
                        {
                            Console.Write(" " + n2);
                        }
                        else
                        {

                        }
                    }
                    
                    break;
                }
            }
            Console.WriteLine();
        }
    }
}