Forth

import java.util.*;

public class forth {


	public static void main(String[] args) {

		Scanner input = new Scanner(System.in);

		int k = Integer.parseInt(input.nextLine());
		
		input.close(); 
		
		
			if (k == 1) {
				System.out.println("2");
				System.out.println("DUP DROP");
			}
		
			else if (k == 2) {
				System.out.println("2");
				System.out.println("DUP +");
			}
		
		else {
		
		int ans = 2 * ( k - 1 );
		
		System.out.println(ans);
		
        for (int i = 1; i < k; i++) {
			System.out.print("DUP ");
        }
		
        for (int i = 2; i < k; i++) {
			System.out.print("+ ");
        }
		
		System.out.print("+");

	}  // else

		

    }
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: ACCEPTED

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: ACCEPTED

Test 6

Verdict: ACCEPTED

Test 7

Verdict: ACCEPTED

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: ACCEPTED

Test 11

Verdict: ACCEPTED

Test 12

Verdict: ACCEPTED

Test 13

Verdict: ACCEPTED