C :

#include <stdio.h>

int main()
{
    int a;
    char b[50];
    while(scanf("%d",&a) != EOF)
{ 
   if (a==1)
      {
      	printf("A~B~C\n");
      	printf("AB~C\n");
      	printf("A+B+C\n");
      	printf("ABC\n");
      	printf("~A~B~C\n");
      	printf("~A~B+~B~C+~A~C\n");
      	printf("~A+~B+~C\n");
      	printf("AB+BC+AC\n");
      }
   else 
 {
   printf("A~B~C");	
 } 
 }
   return 0;
}

C++ :

#include <stdio.h>
 
int main()
{
    int a;
    char b;
    while(scanf("%d",&a) != EOF)
    {if (a==1)
	{
      	printf("A~B~C\n",b);
      	printf("AB~C\n",b);
      	printf("A+B+C\n",b);
      	printf("ABC\n",b);
      	printf("~A~B~C\n",b);
      	printf("~A~B+~B~C+~A~C\n",b);
      	printf("~A+~B+~C\n",b);
        printf("AB+BC+AC\n",b);
    	}
   else{
 	printf("A~B~C\n",b);
	}
 }
}

Java :

import java.util.Scanner;

class Main {
	public static void main(String[] args){
		
		String s;
		Scanner reader = new Scanner(System.in); 
		int a;
                                   	
		while(reader.hasNext()){
                                                    	a = reader.nextInt();
			if(a==1){
				 s = "A~B~C\nAB~C\nA+B+C\nABC\n~A~B~C\n~A~B+~B~C+~A~C\n~A+~B+~C\nAB+BC+AC";

			}
			else {s =  "A~B~C";}
			System.out.print(s);
		}
	}

	
}