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.Text.RegularExpressions;

namespace ITP1_5_D{
    class Sample{
        static void Main(string[] args){
            Sample s = new Sample();
            int num = int.Parse(Console.ReadLine());
            s.call(num);
        }
        void call(int n){
            for(int i=1; i<=n;i++){
                if(i%3 == 0){
                    Console.Write(" {0}",i);
                    continue;
                }
                string x = i.ToString();
                Match mat = Regex.Match(x, "[3]");
                if((string.Compare(mat.Value, "0"))>0){
                    Console.Write(" {0}",i);
                }
            }
            Console.WriteLine();
        }
    }
}