Language: C++

/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
class Main
{
    static int cnt = 0;
	public static void main (String[] args) throws java.lang.Exception
	{
		Scanner scanner = new Scanner(System.in);
		
		int n = Integer.parseInt(scanner.nextLine());
		
		int[] A = new int[n];
		
		//String[] arrayStr = scanner.nextLine().split(" ");
		
		for (int i = 0; i < n; i++) {
			//A[i] = Integer.parseInt(arrayStr[i]);
			A[i] = scanner.nextInt();
		}
		
		shellSort(A, n);
		
        System.out.println(cnt);
		
		for(int num: A) {
		    System.out.println(num);
		}
	}
	
	static int[] shellSort(int[] A, int n) {
	    cnt = 0;
	    
	    int m = n / 3;
	    if (m < 1) {
	        m = 1;
	    }
	    
	    //int[] G = new int[m];
	    int[] G = { 47, 43, 41, 37, 31, 29, 23, 19, 17, 13, 11, 7, 5, 3, 2, 1 };
	    
	    System.out.println(m);
	    printArray(G, G.length - m);
	    
	    
	    for (int i = G.length - m; i < G.length; i++) {
	        
	        A = insertionSort(A, n, G[i]);
	    }
	    
	    return A;
	}
	
	
	static int[] insertionSort(int[] A, int n, int g) {
        for (int i = g; i < n; i++) {
            int v = A[i];
            int j = i - g;
            while (j >= 0 && A[j] > v) {
                A[j + g] = A[j];
                j = j - g;
                cnt++;
            }
            A[j + g] = v;
        }
        return A;
    }
	
	static void printArray(int[] array, int start) {
		for (int i = start; i < array.length; i++) {
			if (i > start) {
				System.out.print(" ");
			}
			System.out.print(array[i]);
		}
		System.out.println();
	}
}


Compiler output:
a.cc:3:1: error: 'import' does not name a type
    3 | import java.util.*;
      | ^~~~~~
a.cc:3:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:4:1: error: 'import' does not name a type
    4 | import java.lang.*;
      | ^~~~~~
a.cc:4:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:5:1: error: 'import' does not name a type
    5 | import java.io.*;
      | ^~~~~~
a.cc:5:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:10:16: error: ISO C++ forbids in-class initialization of non-const static member 'Main::cnt'
   10 |     static int cnt = 0;
      |                ^~~
a.cc:11:15: error: expected ':' before 'static'
   11 |         public static void main (String[] args) throws java.lang.Exception
      |               ^~~~~~~
      |               :
a.cc:11:34: error: 'String' has not been declared
   11 |         public static void main (String[] args) throws java.lang.Exception
      |                                  ^~~~~~
a.cc:11:43: error: expected ',' or '...' before 'args'
   11 |         public static void main (String[] args) throws java.lang.Exception
      |                                           ^~~~
a.cc:11:47: error: expected ';' at end of member declaration
   11 |         public static void main (String[] args) throws java.lang.Exception
      |                                               ^
      |                                                ;
a.cc:11:49: error: 'throws' does not name a type
   11 |         public static void main (String[] args) throws java.lang.Exception
      |                                                 ^~~~~~
a.cc:35:19: error: expected unqualified-id before '[' token
   35 |         static int[] shellSort(int[] A, int n) {
      |                   ^
a.cc:59:19: error: expected unqualified-id before '[' token
   59 |         static int[] insertionSort(int[] A, int n, int g) {
      |                   ^
a.cc:73:38: error: expected ',' or '...' before 'array'
   73 |         static void printArray(int[] array, int start) {
      |                                      ^~~~~
a.cc:82:2: error: expected ';' after class definition
   82 | }
      |  ^
      |  ;
a.cc: In static member function 'static void Main::printArray(int*)':
a.cc:74:30: error: 'start' was not declared in this scope
   74 |                 for (int i = start; i < array.length; i++) {
      |                              ^~~~~
a.cc:74:41: error: 'array' was not declared in this scope
   74 |                 for (int i = start; i < array.length; i++) {
      |                                         ^~~~~
a.cc:76:33: error: 'System' was not declared in this scope
   76 |                                 System.out.print(" ");
      |                                 ^~~~~~
a.cc:78:25: error: 'System' was not declared in this scope
   78 |                         System.out.print(array[i]);
      |                         ^~~~~~
a.cc:80:17: error: 'System' was not declared in this scope
   80 |                 System.out.println();
      |                 ^~~~~~