Language: C++

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;
import java.util.Scanner;


class Main {
	public static void main(String[] args) {
		new Main().run();
	}

	static int N;
	static int[] A;
	static int[] cum;

	void run() {
		Scanner sc = new Scanner(System.in);
		N = sc.nextInt();
		A = new int[N];
		cum = new int[N];
		for (int i = 0; i < N; ++i) {
			A[i] = sc.nextInt();
		}
		cum[0] = A[0];
		for (int i = 1; i < N; ++i) {
			cum[i] = A[i] + cum[i - 1];
		}

		ArrayList<Array> arrs = new ArrayList<Array>();
		for (int left = 0; left < N; ++left) {
			for (int right = left; right < N; ++right) {
				int height = cum[right];
				if (left > 0)
					height -= cum[left - 1];
				arrs.add(new Array(height, left, right));
			}
		}

		Collections.sort(arrs);
		for (int i = 0; i < arrs.size(); ++i) {
			arrs.get(i).id = i;
		}
		Array[] pending = new Array[N + 1];
		for (int i = 0; i <= N; ++i) {
			pending[i] = new Array(-Integer.MAX_VALUE / 16, -1, -1);
			pending[i].cnt = -Integer.MAX_VALUE / 16;
			pending[i].id = -1;
			pending[i].src = -1;
		}
		for (Array arr : arrs) {
			if (arr.left == 0) {
				arr.src = -1;
				arr.cnt = 1;
			} else {
				arr.cnt = pending[arr.left].cnt + 1;
				arr.src = pending[arr.left].id;
			}
			if (pending[arr.right + 1].cnt < arr.cnt) {
				pending[arr.right + 1] = arr;
			}
		}

		System.out.println(pending[N].cnt);
		Array cur = pending[N];
		ArrayList<Integer> ans = new ArrayList<>();
		while (true) {
			ans.add(cur.right);
			if (cur.src == -1)
				break;
			cur = arrs.get(cur.src);
		}
		for (int i = ans.size() - 2; i >= 0; --i) {
			System.out.print(ans.get(i) + (i == 0 ? "\n" : " "));
		}

	}

	class Array implements Comparable<Array> {
		int left;
		int right;
		int src;
		int height;
		int cnt = -Integer.MAX_VALUE;
		int id = -1;

		public Array(int height, int left, int right) {
			this.height = height;
			this.left = left;
			this.right = right;
		}

		@Override
		public int compareTo(Array o) {
			if (height != o.height)
				return Integer.compare(height, o.height);
			else
				return -Integer.compare(left, o.left);
		}

	}

	void tr(Object... objects) {
		System.out.println(Arrays.deepToString(objects));
	}

}

Compiler output:
a.cc:92:17: error: stray '@' in program
   92 |                 @Override
      |                 ^
a.cc:1:1: error: 'import' does not name a type
    1 | import java.util.ArrayList;
      | ^~~~~~
a.cc:1:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:2:1: error: 'import' does not name a type
    2 | import java.util.Arrays;
      | ^~~~~~
a.cc:2:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:3:1: error: 'import' does not name a type
    3 | import java.util.Collections;
      | ^~~~~~
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.util.Scanner;
      | ^~~~~~
a.cc:4:1: note: C++20 'import' only available with '-fmodules-ts'
a.cc:8:15: error: expected ':' before 'static'
    8 |         public static void main(String[] args) {
      |               ^~~~~~~
      |               :
a.cc:8:33: error: 'String' has not been declared
    8 |         public static void main(String[] args) {
      |                                 ^~~~~~
a.cc:8:42: error: expected ',' or '...' before 'args'
    8 |         public static void main(String[] args) {
      |                                          ^~~~
a.cc:13:19: error: expected unqualified-id before '[' token
   13 |         static int[] A;
      |                   ^
a.cc:14:19: error: expected unqualified-id before '[' token
   14 |         static int[] cum;
      |                   ^
a.cc:78:21: error: field 'implements' has incomplete type 'Array'
   78 |         class Array implements Comparable<Array> {
      |                     ^~~~~~~~~~
a.cc:78:15: note: forward declaration of 'class Array'
   78 |         class Array implements Comparable<Array> {
      |               ^~~~~
a.cc:78:21: error: expected ';' at end of member declaration
   78 |         class Array implements Comparable<Array> {
      |                     ^~~~~~~~~~
      |                               ;
a.cc:78:32: error: 'Comparable' does not name a type
   78 |         class Array implements Comparable<Array> {
      |                                ^~~~~~~~~~
a.cc:102:17: error: 'Object' has not been declared
  102 |         void tr(Object... objects) {
      |                 ^~~~~~
a.cc:102:27: error: expansion pattern 'int' contains no parameter packs
  102 |         void tr(Object... objects) {
      |                           ^~~~~~~
a.cc:106:2: error: expected ';' after class definition
  106 | }
      |  ^
      |  ;
a.cc: In static member function 'static void Main::main(int*)':
a.cc:9:27: error: expected ';' before '.' token
    9 |                 new Main().run();
      |                           ^
a.cc: In member function 'void Main::run()':
a.cc:17:17: error: 'Scanner' was not declared in this scope
   17 |                 Scanner sc = new Scanner(System.in);
      |                 ^~~~~~~
a.cc:18:21: error: 'sc' was not declared in this scope
   18 |                 N = sc.nextInt();
      |                     ^~
a.cc:19:17: error: 'A' was not declared in this scope
   19 |                 A = new int[N];
      |                 ^
a.cc:20:17: error: 'cum' was not declared in this scope
   20 |                 cum = new int[N];
      |                 ^~~
a.cc:29:17: error: 'ArrayList' was not declared in this scope
   29 |                 ArrayList<Array> arrs = new ArrayList<Array>();
      |                 ^~~~~~~~~
a.cc:29:32: error: expected primary-expression before '>' token
   29 |                 ArrayList<Array> arrs = new ArrayList<Array>();
      |                                ^
a.cc:29:34: error: 'arrs' was not declared in this scope
   29 |                 ArrayList<Array> arrs = new ArrayList<Array>();
      |                                  ^~~~
a.cc:29:45: error: 'ArrayList' does not name a type
   29 |                 ArrayList<Array> arrs = new ArrayList<Array>();
      |                                             ^~~~~~~~~
a.cc:29:60: error: expected primary-expression before '>' token
   29 |                 ArrayList<Array> arrs = new ArrayList<Array>();
      |                                                            ^
a.cc:29:62: error: expected primary-expression before ')' token
   29 |                 ArrayList<Array> arrs = new ArrayList<Array>();
      |                                                              ^
a.cc:35:71: error: invalid use of incomplete type 'class Array'
   35 |                                 arrs.add(new Array(height, left, right));
      |                                                                       ^
a.cc:78:15: note: forward declaration of 'class Array'
   78 |         class Array implements Comparable<Array> {
      |               ^~~~~
a.cc:39:17: error: 'Collections' was not declared in this scope
   39 |                 Collections.sort(arrs);
      |                 ^~~~~~~~~~~
a.cc:43:22: error: structured binding declaration cannot have type 'Array'
   43 |                 Array[] pending = new Array[N + 1];
      |                      ^~
a.cc:43:22: note: type must be cv-qualified 'auto' or reference to cv-qualified 'auto'
a.cc:43:22: error: empty structured binding declaration
a.cc:43:25: error: expected initializer before 'pending'
   43 |                 Array[] pending = new Array[N + 1];
      |                         ^~~~~~~
a.cc:45:25: error: 'pending' was not declared in this scope
   45 |                         pending[i] = new Array(-Integer.MAX_VALUE / 16, -1, -1);
      |                         ^~~~~~~
a.cc:45:49: error: 'Integer' was not declared in this scope
   45 |                         pending[i] = new Array(-Integer.MAX_VALUE / 16, -1, -1);
      |                                                 ^~~~~~~
a.cc:45:79: error: invalid use of incomplete type 'class Array'
   45 |                         pending[i] = new Array(-Integer.MAX_VALUE / 16, -1, -1);
      |                                                                               ^
a.cc:78:15: note: forward declaration of 'class Array'
   78 |         class Array implements Comparable<Array> {
      |               ^~~~~
a.cc:50:28: error: variable 'Array arr' has initializer but incomplete type
   50 |                 for (Array arr : arrs) {
      |                            ^~~
a.cc:55:43: error: 'pending' was not declared in this scope
   55 |                                 arr.cnt = pending[arr.left].cnt + 1;
      |                                           ^~~~~~~
a.cc:58:29: error: 'pending' was not declared in this scope
   58 |                         if (pending[arr.right + 1].cnt < arr.cnt) {
      |                             ^~~~~~~
a.cc:63:17: error: 'System' was not declared in this scope
   63 |                 System.out.println(pending[N].cnt);
      |                 ^~~~~~
a.cc:63:36: error: 'pending' was not declared in this scope
   63 |                 System.out.println(pending[N].cnt);
      |                                    ^~~~~~~
a.cc:64:23: error: variable 'Array cur' has initializer but incomplete type
   64 |                 Array cur = pending[N];
      |                       ^~~
a.cc:65:27: error: 'Integer' was not declared in this scope
   65 |                 ArrayList<Integer> ans = new ArrayList<>();
      |                           ^~~~~~~
a.cc:65:36: error: 'ans' was not declared in this scope
   65 |                 ArrayList<Integer> ans = new ArrayList<>();
      |                                    ^~~
a.cc:65:46: error: 'ArrayList' does not name a type
   65 |                 ArrayList<Integer> ans = new ArrayList<>();
      |                                              ^~~~~~~~~
a.cc:65:56: error: expected primary-expression before '>' token
   65 |                 ArrayList<Integer> ans = new ArrayList<>();
      |                                                        ^
a.cc:65:58: error: expected primary-expression before ')' token
   65 |                 ArrayList<Integer> ans = new ArrayList<>();
      |                                                          ^
a.cc: In member function 'void Main::tr(...)':
a.cc:103:17: error: 'System' was not declared in this scope
  103 |                 System.out.println(Arrays.deepToString(objects));
      |                 ^~~~~~
a.cc:103:36: error: 'Arrays' was not declared in this scope; did you mean 'Array'?
  103 |                 System.out.println(Arrays.deepToString(objects));
      |                                    ^~~~~~
      |                                    Array
a.cc:103:56: error: 'objects' was not declared in this scope
  103 |                 System.out.println(Arrays.deepToString(objects));
      |                                                        ^~~~~~~