C :

#include<stdio.h>
int main()
{
 int x;
 while(scanf("%d",&x)!=EOF)
 {
  if(x<1)
  {
   printf("%d\n",x);
  }
  if(x>=1&&x<10)
  {
   printf("%d\n",2*x-1);
  }
  if(x>=10)
  {
    printf("%d\n",3*x-11);
  }
 }

 
}

C++ :

#include<iostream>
using namespace std;
int main(){
	int x,y;
    cin>>x;
    if(x<1) y=x;
	if(x>1||x==1){
		if(x<10)   y=2*x-1;
		else   y=3*x-11;
	}
	cout<<y; 
}

Java :

import java.util.Scanner;

public class Main {

	/**
	 * @param args
	 */
	public static void main(String[] args) {
		// TODO Auto-generated method stub
		Scanner input  = new Scanner(System.in);
		int x = input.nextInt();
		if(x < 1){
			System.out.println(x);
		}else if(x >= 1 && x < 10){
			System.out.println(2*x-1);
		}else{
			System.out.println(3*x-11);
		}
	}

}

Python :

def func(x):
    if(x<1):
        return x
    elif(x>=1 and x<10):
        return x*2-1
    else:
        return 3*x-11
x=int(raw_input())

print func(x)