Find all distinct combinations of k sum in array

Here given code implementation process.

import java.util.Arrays;
import java.util.ArrayList;
/*
    Java Program for
    Find all distinct combinations of k sum in array
*/
public class Combinations
{
	public void printArray(int[] arr, int n)
	{
		System.out.print("\n Array : ");
		for (int i = 0; i < n; ++i)
		{
			System.out.print(" " + arr[i]);
		}
	}
	public void printCombination(
      ArrayList < Integer > data, 
      ArrayList < String > result, 
      int index, 
      int count, 
      int k, 
      int sum, 
      String ans)
	{
		if (sum == k)
		{
			result.add(ans);
		}
		if (index >= data.size() || count > data.size())
		{
			return;
		}
		int i = index;
		while (i < data.size())
		{
			printCombination(data, 
                             result, i, 
                             count + 1, 
                             k, data.get(i) + sum, 
                             ans + " " + data.get(i));
			i++;
		}
	}
	public void distinctCombination(int[] arr, int n, int k)
	{
		if (n <= 0)
		{
			return;
		}
		printArray(arr, n);
		// First sort given array
		Arrays.sort(arr);
		// Auxiliary space 
		ArrayList < Integer > data = new ArrayList < Integer > ();
		ArrayList < String > result = new ArrayList < String > ();
		// Add first element
		data.add(arr[0]);
		// Collect all distinct elements
		for (int i = 1; i < n; ++i)
		{
			if (arr[i] != arr[i - 1])
			{
				data.add(arr[i]);
			}
		}
		// Print combinations
		printCombination(data, result, 0, 0, k, 0, "");
		System.out.print("\n Given k : " + k);
		System.out.print("\n Result : ");
		if (result.size() == 0)
		{
			// When k sum  not exist
			System.out.print(" None \n");
		}
		else
		{
			System.out.print("\n");
			// Display combination
			for (int i = 0; i < result.size(); ++i)
			{
				System.out.println(result.get(i));
			}
		}
	}
	public static void main(String[] args)
	{
		Combinations task = new Combinations();
		int[] arr1 = {
			5 , 2 , 2 , 1 , 6 , 3 , 4
		};
		int[] arr2 = {
			6 , -3 , 2 , 3 , 1 , 4 , 1
		};
		// Test A
		// Get the length of array
		int n = arr1.length;
		// Sum k
		int k = 7;
		// Test
		task.distinctCombination(arr1, n, k);
		// Test B
		// Get the length of array
		n = arr2.length;
		// Sum k
		k = -4;
		// Test
		task.distinctCombination(arr2, n, k);
	}
}

Output

 Array :  5 2 2 1 6 3 4
 Given k : 7
 Result :
 1 1 1 1 1 1 1
 1 1 1 1 1 2
 1 1 1 1 3
 1 1 1 2 2
 1 1 1 4
 1 1 2 3
 1 1 5
 1 2 2 2
 1 2 4
 1 3 3
 1 6
 2 2 3
 2 5
 3 4

 Array :  6 -3 2 3 1 4 1
 Given k : -4
 Result :
 -3 -3 -3 -3 1 1 6
 -3 -3 -3 -3 1 3 4
 -3 -3 -3 -3 2 2 4
 -3 -3 -3 -3 2 3 3
 -3 -3 -3 -3 2 6
 -3 -3 -3 -3 4 4
 -3 -3 -3 1 1 1 2
 -3 -3 -3 1 1 3
 -3 -3 -3 1 2 2
 -3 -3 -3 1 4
 -3 -3 -3 2 3
 -3 -3 1 1
 -3 -3 2
// Include header file
#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;
/*
    C++ Program for
    Find all distinct combinations of k sum in array
*/
class Combinations
{
	public: void printArray(int arr[], int n)
	{
		cout << "\n Array : ";
		for (int i = 0; i < n; ++i)
		{
			cout << " " << arr[i];
		}
	}
	void printCombination(
      vector < int > data, 
      vector < string > &result, 
      int index, 
      int count, 
      int k, 
      int sum, 
      string ans)
	{
		if (sum == k)
		{
			result.push_back(ans);
		}
		if (index >= data.size() || count > data.size())
		{
			return;
		}
		int i = index;
		while (i < data.size())
		{
			this->printCombination(
              data, result, i, 
              count + 1, k, 
              data.at(i) + sum, ans  +  " "
				 +  to_string(data.at(i))
            );
			i++;
		}
	}
	void distinctCombination(int arr[], int n, int k)
	{
		if (n <= 0)
		{
			return;
		}
		this->printArray(arr, n);
		// First sort given array
		sort(arr, arr + n);
		// Auxiliary space 
		vector < int > data;
		vector < string > result;
		// Add first element
		data.push_back(arr[0]);
		// Collect all distinct elements
		for (int i = 1; i < n; ++i)
		{
			if (arr[i] != arr[i - 1])
			{
				data.push_back(arr[i]);
			}
		}
		// Print combinations
		this->printCombination(data, result, 0, 0, k, 0, "");
		cout << "\n Given k : " << k;
		cout << "\n Result : ";
		if (result.size() == 0)
		{
			// When k sum  not exist
			cout << " None \n";
		}
		else
		{
			cout << "\n";
			// Display combination
			for (int i = 0; i < result.size(); ++i)
			{
				cout << result.at(i) << endl;
			}
		}
	}
};
int main()
{
	Combinations *task = new Combinations();
	int arr1[] = {
		5 , 2 , 2 , 1 , 6 , 3 , 4
	};
	int arr2[] = {
		6 , -3 , 2 , 3 , 1 , 4 , 1
	};
	// Test A
	// Get the length of array
	int n = sizeof(arr1) / sizeof(arr1[0]);
	// Sum k
	int k = 7;
	// Test
	task->distinctCombination(arr1, n, k);
	// Test B
	// Get the length of array
	n = sizeof(arr2) / sizeof(arr2[0]);
	// Sum k
	k = -4;
	// Test
	task->distinctCombination(arr2, n, k);
	return 0;
}

Output

 Array :  5 2 2 1 6 3 4
 Given k : 7
 Result :
 1 1 1 1 1 1 1
 1 1 1 1 1 2
 1 1 1 1 3
 1 1 1 2 2
 1 1 1 4
 1 1 2 3
 1 1 5
 1 2 2 2
 1 2 4
 1 3 3
 1 6
 2 2 3
 2 5
 3 4

 Array :  6 -3 2 3 1 4 1
 Given k : -4
 Result :
 -3 -3 -3 -3 1 1 6
 -3 -3 -3 -3 1 3 4
 -3 -3 -3 -3 2 2 4
 -3 -3 -3 -3 2 3 3
 -3 -3 -3 -3 2 6
 -3 -3 -3 -3 4 4
 -3 -3 -3 1 1 1 2
 -3 -3 -3 1 1 3
 -3 -3 -3 1 2 2
 -3 -3 -3 1 4
 -3 -3 -3 2 3
 -3 -3 1 1
 -3 -3 2
// Include namespace system
using System;
using System.Collections.Generic;
/*
    Csharp Program for
    Find all distinct combinations of k sum in array
*/
public class Combinations
{
	public void printArray(int[] arr, int n)
	{
		Console.Write("\n Array : ");
		for (int i = 0; i < n; ++i)
		{
			Console.Write(" " + arr[i]);
		}
	}
	public void printCombination(
      List < int > data, List < string > result, 
      int index, int count, 
      int k, int sum, String ans)
	{
		if (sum == k)
		{
			result.Add(ans);
		}
		if (index >= data.Count || count > data.Count)
		{
			return;
		}
		int i = index;
		while (i < data.Count)
		{
			this.printCombination(
              data, result, i, count + 1, 
              k, data[i] + sum, ans + " " + data[i]);
			i++;
		}
	}
	public void distinctCombination(int[] arr, int n, int k)
	{
		if (n <= 0)
		{
			return;
		}
		this.printArray(arr, n);
		// First sort given array
		Array.Sort(arr);
		// Auxiliary space 
		List < int > data = new List < int > ();
		List < string > result = new List < string > ();
		// Add first element
		data.Add(arr[0]);
		// Collect all distinct elements
		for (int i = 1; i < n; ++i)
		{
			if (arr[i] != arr[i - 1])
			{
				data.Add(arr[i]);
			}
		}
		// Print combinations
		this.printCombination(data, result, 0, 0, k, 0, "");
		Console.Write("\n Given k : " + k);
		Console.Write("\n Result : ");
		if (result.Count == 0)
		{
			// When k sum  not exist
			Console.Write(" None \n");
		}
		else
		{
			Console.Write("\n");
			// Display combination
			for (int i = 0; i < result.Count; ++i)
			{
				Console.WriteLine(result[i]);
			}
		}
	}
	public static void Main(String[] args)
	{
		Combinations task = new Combinations();
		int[] arr1 = {
			5 , 2 , 2 , 1 , 6 , 3 , 4
		};
		int[] arr2 = {
			6 , -3 , 2 , 3 , 1 , 4 , 1
		};
		// Test A
		// Get the length of array
		int n = arr1.Length;
		// Sum k
		int k = 7;
		// Test
		task.distinctCombination(arr1, n, k);
		// Test B
		// Get the length of array
		n = arr2.Length;
		// Sum k
		k = -4;
		// Test
		task.distinctCombination(arr2, n, k);
	}
}

Output

 Array :  5 2 2 1 6 3 4
 Given k : 7
 Result :
 1 1 1 1 1 1 1
 1 1 1 1 1 2
 1 1 1 1 3
 1 1 1 2 2
 1 1 1 4
 1 1 2 3
 1 1 5
 1 2 2 2
 1 2 4
 1 3 3
 1 6
 2 2 3
 2 5
 3 4

 Array :  6 -3 2 3 1 4 1
 Given k : -4
 Result :
 -3 -3 -3 -3 1 1 6
 -3 -3 -3 -3 1 3 4
 -3 -3 -3 -3 2 2 4
 -3 -3 -3 -3 2 3 3
 -3 -3 -3 -3 2 6
 -3 -3 -3 -3 4 4
 -3 -3 -3 1 1 1 2
 -3 -3 -3 1 1 3
 -3 -3 -3 1 2 2
 -3 -3 -3 1 4
 -3 -3 -3 2 3
 -3 -3 1 1
 -3 -3 2
package main
import "strconv"
import "sort"
import "fmt"
/*
    Go Program for
    Find all distinct combinations of k sum in array
*/
type Combinations struct { result bool}
func getCombinations() * Combinations {
	var me *Combinations = &Combinations {}
	me.result = false
	return me
}
func(this Combinations) printArray(arr[] int, n int) {
	fmt.Print("\n Array : ")
	for i := 0 ; i < n ; i++ {
		fmt.Print(" ", arr[i])
	}
}
func(this Combinations) printCombination(data []int, index int, count int, k int, sum int, ans string) {
	if sum == k {
		fmt.Print(ans,"\n");
	
	}
	if index >= len(data) || count > len(data) {
		return
	}
	var i int = index
	for (i < len(data)) {
		this.printCombination(data, i, count + 1, 
			k, data[i] + sum, ans + " " + strconv.Itoa(data[i]))
		i++
	}
}
func(this Combinations) distinctCombination(arr[] int, n int, k int) {
	if n <= 0 {
		return
	}
	this.printArray(arr, n)
	// First sort given array
	sort.Ints(arr)
	// Auxiliary space 
	var data = make([]int, 0)
	this.result = false
	// Add first element
	data = append(data, arr[0])
	// Collect all distinct elements
	for i := 1 ; i < n ; i++ {
		if arr[i] != arr[i - 1] {
			data = append(data, arr[i])
		}
	}
	fmt.Print("\n Given k : ", k)
	fmt.Print("\n Result : ")
	// Print combinations
	this.printCombination(data, 0, 0, k, 0, "")

	if this.result == true {
		// When k sum  not exist
		fmt.Print(" None \n")
	} 
}
func main() {
	var task * Combinations = getCombinations()
	var arr1 = [] int { 5 , 2 , 2 , 1 , 6 , 3 , 4 }
	var arr2 = [] int { 6 , -3 , 2 , 3 , 1 , 4 , 1 }
	// Test A
	// Get the length of array
	var n int = len(arr1)
	// Sum k
	var k int = 7
	// Test
	task.distinctCombination(arr1, n, k)
	// Test B
	// Get the length of array
	n = len(arr2)
	// Sum k
	k = -4
	// Test
	task.distinctCombination(arr2, n, k)
}

Output

Array :  5 2 2 1 6 3 4
 Given k : 7
 Result :  1 1 1 1 1 1 1
 1 1 1 1 1 2
 1 1 1 1 3
 1 1 1 2 2
 1 1 1 4
 1 1 2 3
 1 1 5
 1 2 2 2
 1 2 4
 1 3 3
 1 6
 2 2 3
 2 5
 3 4

 Array :  6 -3 2 3 1 4 1
 Given k : -4
 Result :  -3 -3 -3 -3 1 1 6
 -3 -3 -3 -3 1 3 4
 -3 -3 -3 -3 2 2 4
 -3 -3 -3 -3 2 3 3
 -3 -3 -3 -3 2 6
 -3 -3 -3 -3 4 4
 -3 -3 -3 1 1 1 2
 -3 -3 -3 1 1 3
 -3 -3 -3 1 2 2
 -3 -3 -3 1 4
 -3 -3 -3 2 3
 -3 -3 1 1
 -3 -3 2
<?php
/*
    Php Program for
    Find all distinct combinations of k sum in array
*/
class Combinations
{
	public	function printArray($arr, $n)
	{
		echo("\n Array : ");
		for ($i = 0; $i < $n; ++$i)
		{
			echo(" ".$arr[$i]);
		}
	}
	public	function printCombination(
  		$data, &$result, $index, 
   		$count, $k, $sum, $ans)
	{
		if ($sum == $k)
		{
			$result[] = $ans;
		}
		if ($index >= count($data) || $count > count($data))
		{
			return;
		}
		$i = $index;
		while ($i < count($data))
		{
			$this->printCombination(
              $data, $result, $i, 
              $count + 1, $k, 
              $data[$i] + $sum, $ans." ".strval($data[$i]));
			$i++;
		}
	}
	public	function distinctCombination($arr, $n, $k)
	{
		if ($n <= 0)
		{
			return;
		}
		$this->printArray($arr, $n);
		// First sort given array
		sort($arr);
		// Auxiliary space 
		$data = array();
		$result = array();
		// Add first element
		$data[] = $arr[0];
		// Collect all distinct elements
		for ($i = 1; $i < $n; ++$i)
		{
			if ($arr[$i] != $arr[$i - 1])
			{
				$data[] = $arr[$i];
			}
		}
		// Print combinations
		$this->printCombination($data, $result, 0, 0, $k, 0, "");
		echo("\n Given k : ".$k);
		echo("\n Result : ");
		if (count($result) == 0)
		{
			// When k sum  not exist
			echo(" None \n");
		}
		else
		{
			echo("\n");
			// Display combination
			for ($i = 0; $i < count($result); ++$i)
			{
				echo($result[$i]."\n");
			}
		}
	}
}

function main()
{
	$task = new Combinations();
	$arr1 = array(5, 2, 2, 1, 6, 3, 4);
	$arr2 = array(6, -3, 2, 3, 1, 4, 1);
	// Test A
	// Get the length of array
	$n = count($arr1);
	// Sum k
	$k = 7;
	// Test
	$task->distinctCombination($arr1, $n, $k);
	// Test B
	// Get the length of array
	$n = count($arr2);
	// Sum k
	$k = -4;
	// Test
	$task->distinctCombination($arr2, $n, $k);
}
main();

Output

 Array :  5 2 2 1 6 3 4
 Given k : 7
 Result :
 1 1 1 1 1 1 1
 1 1 1 1 1 2
 1 1 1 1 3
 1 1 1 2 2
 1 1 1 4
 1 1 2 3
 1 1 5
 1 2 2 2
 1 2 4
 1 3 3
 1 6
 2 2 3
 2 5
 3 4

 Array :  6 -3 2 3 1 4 1
 Given k : -4
 Result :
 -3 -3 -3 -3 1 1 6
 -3 -3 -3 -3 1 3 4
 -3 -3 -3 -3 2 2 4
 -3 -3 -3 -3 2 3 3
 -3 -3 -3 -3 2 6
 -3 -3 -3 -3 4 4
 -3 -3 -3 1 1 1 2
 -3 -3 -3 1 1 3
 -3 -3 -3 1 2 2
 -3 -3 -3 1 4
 -3 -3 -3 2 3
 -3 -3 1 1
 -3 -3 2
/*
    Node JS Program for
    Find all distinct combinations of k sum in array
*/
class Combinations
{
	printArray(arr, n)
	{
		process.stdout.write("\n Array : ");
		for (var i = 0; i < n; ++i)
		{
			process.stdout.write(" " + arr[i]);
		}
	}
	printCombination(data, result, index, count, k, sum, ans)
	{
		if (sum == k)
		{
			result.push(ans);
		}
		if (index >= data.length || count > data.length)
		{
			return;
		}
		var i = index;
		while (i < data.length)
		{
			this.printCombination(
              data, result, i, count + 1, k, 
              data[i] + sum, ans + " " + data[i]);
			i++;
		}
	}
	distinctCombination(arr, n, k)
	{
		if (n <= 0)
		{
			return;
		}
		this.printArray(arr, n);
		// First sort given array
		arr.sort(function(a, b)
		{
			return a - b;
		});
		// Auxiliary space 
		var data = [];
		var result = [];
		// Add first element
		data.push(arr[0]);
		// Collect all distinct elements
		for (var i = 1; i < n; ++i)
		{
			if (arr[i] != arr[i - 1])
			{
				data.push(arr[i]);
			}
		}
		// Print combinations
		this.printCombination(data, result, 0, 0, k, 0, "");
		process.stdout.write("\n Given k : " + k);
		process.stdout.write("\n Result : ");
		if (result.length == 0)
		{
			// When k sum  not exist
			process.stdout.write(" None \n");
		}
		else
		{
			process.stdout.write("\n");
			// Display combination
			for (var i = 0; i < result.length; ++i)
			{
				console.log(result[i]);
			}
		}
	}
}

function main()
{
	var task = new Combinations();
	var arr1 = [5, 2, 2, 1, 6, 3, 4];
	var arr2 = [6, -3, 2, 3, 1, 4, 1];
	// Test A
	// Get the length of array
	var n = arr1.length;
	// Sum k
	var k = 7;
	// Test
	task.distinctCombination(arr1, n, k);
	// Test B
	// Get the length of array
	n = arr2.length;
	// Sum k
	k = -4;
	// Test
	task.distinctCombination(arr2, n, k);
}
main();

Output

 Array :  5 2 2 1 6 3 4
 Given k : 7
 Result :
 1 1 1 1 1 1 1
 1 1 1 1 1 2
 1 1 1 1 3
 1 1 1 2 2
 1 1 1 4
 1 1 2 3
 1 1 5
 1 2 2 2
 1 2 4
 1 3 3
 1 6
 2 2 3
 2 5
 3 4

 Array :  6 -3 2 3 1 4 1
 Given k : -4
 Result :
 -3 -3 -3 -3 1 1 6
 -3 -3 -3 -3 1 3 4
 -3 -3 -3 -3 2 2 4
 -3 -3 -3 -3 2 3 3
 -3 -3 -3 -3 2 6
 -3 -3 -3 -3 4 4
 -3 -3 -3 1 1 1 2
 -3 -3 -3 1 1 3
 -3 -3 -3 1 2 2
 -3 -3 -3 1 4
 -3 -3 -3 2 3
 -3 -3 1 1
 -3 -3 2
#    Python 3 Program for
#    Find all distinct combinations of k sum in array
class Combinations :
	def printArray(self, arr, n) :
		print("\n Array : ", end = "")
		i = 0
		while (i < n) :
			print(" ", arr[i], end = "")
			i += 1
		
	
	def printCombination(self, data, result, 
                         index, count, k, sum, ans) :
		if (sum == k) :
			result.append(ans)
		
		if (index >= len(data) or count > len(data)) :
			return
		
		i = index
		while (i < len(data)) :
			self.printCombination(data, result, 
                                  i, count + 1, k, 
                                  data[i] + sum, ans + " " + str(data[i]))
			i += 1
		
	
	def distinctCombination(self, arr, n, k) :
		if (n <= 0) :
			return
		
		self.printArray(arr, n)
		#  First sort given list
		arr.sort()
		#  Auxiliary space 
		data = []
		result = []
		#  Add first element
		data.append(arr[0])
		i = 1
		#  Collect all distinct elements
		while (i < n) :
			if (arr[i] != arr[i - 1]) :
				data.append(arr[i])
			
			i += 1
		
		#  Print combinations
		self.printCombination(data, result, 0, 0, k, 0, "")
		print("\n Given k : ", k, end = "")
		print("\n Result : ", end = "")
		if (len(result) == 0) :
			#  When k sum  not exist
			print(" None ")
		else :
			print(end = "\n")
			i = 0
			#  Display combination
			while (i < len(result)) :
				print(result[i])
				i += 1
			
		
	

def main() :
	task = Combinations()
	arr1 = [5, 2, 2, 1, 6, 3, 4]
	arr2 = [6, -3, 2, 3, 1, 4, 1]
	#  Test A
	#  Get the length of list
	n = len(arr1)
	#  Sum k
	k = 7
	#  Test
	task.distinctCombination(arr1, n, k)
	#  Test B
	#  Get the length of list
	n = len(arr2)
	#  Sum k
	k = -4
	#  Test
	task.distinctCombination(arr2, n, k)

if __name__ == "__main__": main()

Output

 Array :   5  2  2  1  6  3  4
 Given k :  7
 Result :
 1 1 1 1 1 1 1
 1 1 1 1 1 2
 1 1 1 1 3
 1 1 1 2 2
 1 1 1 4
 1 1 2 3
 1 1 5
 1 2 2 2
 1 2 4
 1 3 3
 1 6
 2 2 3
 2 5
 3 4

 Array :   6  -3  2  3  1  4  1
 Given k :  -4
 Result :
 -3 -3 -3 -3 1 1 6
 -3 -3 -3 -3 1 3 4
 -3 -3 -3 -3 2 2 4
 -3 -3 -3 -3 2 3 3
 -3 -3 -3 -3 2 6
 -3 -3 -3 -3 4 4
 -3 -3 -3 1 1 1 2
 -3 -3 -3 1 1 3
 -3 -3 -3 1 2 2
 -3 -3 -3 1 4
 -3 -3 -3 2 3
 -3 -3 1 1
 -3 -3 2
#    Ruby Program for
#    Find all distinct combinations of k sum in array
class Combinations 
	def printArray(arr, n) 
		print("\n Array : ")
		i = 0
		while (i < n) 
			print(" ", arr[i])
			i += 1
		end

	end

	def printCombination(data, result, index, count, k, sum, ans) 
		if (sum == k) 
			result.push(ans)
		end

		if (index >= data.length || count > data.length) 
			return
		end

		i = index
		while (i < data.length) 
			self.printCombination(data, result, i, 
                  count + 1, k, 
                  data[i] + sum, ans + " " + data[i].to_s)
			i += 1
		end

	end

	def distinctCombination(arr, n, k) 
		if (n <= 0) 
			return
		end

		self.printArray(arr, n)
		#  First sort given array
		arr = arr.sort
		#  Auxiliary space 
		data = []
		result = []
		#  Add first element
		data.push(arr[0])
		i = 1
		#  Collect all distinct elements
		while (i < n) 
			if (arr[i] != arr[i - 1]) 
				data.push(arr[i])
			end
			i += 1
		end

		#  Print combinations
		self.printCombination(data, result, 0, 0, k, 0, "")
		print("\n Given k : ", k)
		print("\n Result : ")
		if (result.length == 0) 
			#  When k sum  not exist
			print(" None \n")
		else
 
			print("\n")
			i = 0
			#  Display combination
			while (i < result.length) 
				print(result[i], "\n")
				i += 1
			end

		end

	end

end

def main() 
	task = Combinations.new()
	arr1 = [5, 2, 2, 1, 6, 3, 4]
	arr2 = [6, -3, 2, 3, 1, 4, 1]
	#  Test A
	#  Get the length of array
	n = arr1.length
	#  Sum k
	k = 7
	#  Test
	task.distinctCombination(arr1, n, k)
	#  Test B
	#  Get the length of array
	n = arr2.length
	#  Sum k
	k = -4
	#  Test
	task.distinctCombination(arr2, n, k)
end

main()

Output

 Array :  5 2 2 1 6 3 4
 Given k : 7
 Result : 
 1 1 1 1 1 1 1
 1 1 1 1 1 2
 1 1 1 1 3
 1 1 1 2 2
 1 1 1 4
 1 1 2 3
 1 1 5
 1 2 2 2
 1 2 4
 1 3 3
 1 6
 2 2 3
 2 5
 3 4

 Array :  6 -3 2 3 1 4 1
 Given k : -4
 Result : 
 -3 -3 -3 -3 1 1 6
 -3 -3 -3 -3 1 3 4
 -3 -3 -3 -3 2 2 4
 -3 -3 -3 -3 2 3 3
 -3 -3 -3 -3 2 6
 -3 -3 -3 -3 4 4
 -3 -3 -3 1 1 1 2
 -3 -3 -3 1 1 3
 -3 -3 -3 1 2 2
 -3 -3 -3 1 4
 -3 -3 -3 2 3
 -3 -3 1 1
 -3 -3 2
import scala.collection.mutable._;
/*
    Scala Program for
    Find all distinct combinations of k sum in array
*/
class Combinations()
{
	def printArray(arr: Array[Int], n: Int): Unit = {
		print("\n Array : ");
		var i: Int = 0;
		while (i < n)
		{
			print(" " + arr(i));
			i += 1;
		}
	}
	def printCombination(
      data: ArrayBuffer[Int], 
      result: ArrayBuffer[String], 
        index: Int, count: Int, 
          k: Int, sum: Int, 
            ans: String): Unit = {
		if (sum == k)
		{
			result += ans;
		}
		if (index >= data.size || count > data.size)
		{
			return;
		}
		var i: Int = index;
		while (i < data.size)
		{
			printCombination(data, result, i, 
                             count + 1, k, data(i) + sum, 
                             ans + " " + data(i).toString());
			i += 1;
		}
	}
	def distinctCombination(arr: Array[Int], n: Int, k: Int): Unit = {
		if (n <= 0)
		{
			return;
		}
		printArray(arr, n);
		// First sort given array
		arr.sorted;
		// Auxiliary space 
		var data: ArrayBuffer[Int] = new ArrayBuffer[Int]();
		var result: ArrayBuffer[String] = new ArrayBuffer[String]();
		// Add first element
		data += arr(0);
		var i: Int = 1;
		// Collect all distinct elements
		while (i < n)
		{
			if (arr(i) != arr(i - 1))
			{
				data += arr(i);
			}
			i += 1;
		}
		// Print combinations
		printCombination(data, result, 0, 0, k, 0, "");
		print("\n Given k : " + k);
		print("\n Result : ");
		if (result.size == 0)
		{
			// When k sum  not exist
			print(" None \n");
		}
		else
		{
			print("\n");
			var i: Int = 0;
			// Display combination
			while (i < result.size)
			{
				println(result(i));
				i += 1;
			}
		}
	}
}
object Main
{
	def main(args: Array[String]): Unit = {
		var task: Combinations = new Combinations();
		var arr1: Array[Int] = Array(5, 2, 2, 1, 6, 3, 4);
		var arr2: Array[Int] = Array(6, -3, 2, 3, 1, 4, 1);
		// Test A
		// Get the length of array
		var n: Int = arr1.length;
		// Sum k
		var k: Int = 7;
		// Test
		task.distinctCombination(arr1, n, k);
		// Test B
		// Get the length of array
		n = arr2.length;
		// Sum k
		k = -4;
		// Test
		task.distinctCombination(arr2, n, k);
	}
}

Output

 Array :  5 2 2 1 6 3 4
 Given k : 7
 Result :
 5 2
 5 1 1
 2 2 2 1
 2 2 1 1 1
 2 2 3
 2 1 1 1 1 1
 2 1 1 3
 2 1 4
 1 1 1 1 1 1 1
 1 1 1 1 3
 1 1 1 4
 1 6
 1 3 3
 3 4

 Array :  6 -3 2 3 1 4 1
 Given k : -4
 Result :
 6 -3 -3 -3 -3 -3 2 3
 6 -3 -3 -3 -3 -3 1 4
 6 -3 -3 -3 -3 -3 4 1
 6 -3 -3 -3 -3 2
 6 -3 -3 -3 -3 1 1
 6 -3 -3 -3 -3 1 1
 6 -3 -3 -3 -3 1 1
 -3 -3 -3 -3 -3 3 4 4
 -3 -3 -3 -3 2 2 2 2
 -3 -3 -3 -3 2 2 3 1
 -3 -3 -3 -3 2 2 3 1
 -3 -3 -3 -3 2 2 4
 -3 -3 -3 -3 2 3 3
 -3 -3 -3 -3 2 1 1 4
 -3 -3 -3 -3 2 1 4 1
 -3 -3 -3 -3 2 4 1 1
 -3 -3 -3 -3 3 3 1 1
 -3 -3 -3 -3 3 3 1 1
 -3 -3 -3 -3 3 3 1 1
 -3 -3 -3 -3 3 1 4
 -3 -3 -3 -3 3 4 1
 -3 -3 -3 -3 4 4
 -3 -3 -3 2 2 1
 -3 -3 -3 2 2 1
 -3 -3 -3 2 3
 -3 -3 -3 2 1 1 1
 -3 -3 -3 2 1 1 1
 -3 -3 -3 2 1 1 1
 -3 -3 -3 2 1 1 1
 -3 -3 -3 3 1 1
 -3 -3 -3 3 1 1
 -3 -3 -3 3 1 1
 -3 -3 -3 1 1 1 1 1
 -3 -3 -3 1 1 1 1 1
 -3 -3 -3 1 1 1 1 1
 -3 -3 -3 1 1 1 1 1
 -3 -3 -3 1 4
 -3 -3 -3 1 1 1 1 1
 -3 -3 -3 4 1
 -3 -3 -3 1 1 1 1 1
 -3 -3 2
 -3 -3 1 1
 -3 -3 1 1
 -3 -3 1 1
import Foundation;
/*
    Swift 4 Program for
    Find all distinct combinations of k sum in array
*/
class Combinations
{
	func printArray(_ arr: [Int], _ n: Int)
	{
		print("\n Array : ", terminator: "");
		var i: Int = 0;
		while (i < n)
		{
			print(" ", arr[i], terminator: "");
			i += 1;
		}
	}
	func printCombination(
      _ data: [Int], 
      _ result: inout[String], 
        _ index: Int, 
          _ count: Int, 
            _ k: Int, 
              _ sum: Int, 
                _ ans: String)
	{
		if (sum == k)
		{
			result.append(ans);
		}
		if (index >= data.count || count > data.count)
		{
			return;
		}
		var i: Int = index;
		while (i < data.count)
		{
			self.printCombination(
              data, &result, i, count + 1, 
              k, data[i] + sum, ans + " " + String(data[i]));
			i += 1;
		}
	}
	func distinctCombination(_ arr: [Int], _ n: Int, _ k: Int)
	{
		if (n <= 0)
		{
			return;
		}
		self.printArray(arr, n);
		// First sort given array
		var value = arr.sorted();
		// Auxiliary space 
		var data: [Int] = [Int]();
		var result: [String] = [String]();
		// Add first element
		data.append(value[0]);
		var i: Int = 1;
		// Collect all distinct elements
		while (i < n)
		{
			if (value[i]  != value[i - 1])
			{
				data.append(value[i]);
			}
			i += 1;
		}
		// Print combinations
		self.printCombination(data, &result, 0, 0, k, 0, "");
		print("\n Given k : ", k, terminator: "");
		print("\n Result : ", terminator: "");
		if (result.count == 0)
		{
			// When k sum  not exist
			print(" None ");
		}
		else
		{
			print(terminator: "\n");
			var i: Int = 0;
			// Display combination
			while (i < result.count)
			{
				print(result[i]);
				i += 1;
			}
		}
	}
}
func main()
{
	let task: Combinations = Combinations();
	let arr1: [Int] = [5, 2, 2, 1, 6, 3, 4];
	let arr2: [Int] = [6, -3, 2, 3, 1, 4, 1];
	// Test A
	// Get the length of array
	var n: Int = arr1.count;
	// Sum k
	var k: Int = 7;
	// Test
	task.distinctCombination(arr1, n, k);
	// Test B
	// Get the length of array
	n = arr2.count;
	// Sum k
	k = -4;
	// Test
	task.distinctCombination(arr2, n, k);
}
main();

Output

 Array :   5  2  2  1  6  3  4
 Given k :  7
 Result :
 1 1 1 1 1 1 1
 1 1 1 1 1 2
 1 1 1 1 3
 1 1 1 2 2
 1 1 1 4
 1 1 2 3
 1 1 5
 1 2 2 2
 1 2 4
 1 3 3
 1 6
 2 2 3
 2 5
 3 4

 Array :   6  -3  2  3  1  4  1
 Given k :  -4
 Result :
 -3 -3 -3 -3 1 1 6
 -3 -3 -3 -3 1 3 4
 -3 -3 -3 -3 2 2 4
 -3 -3 -3 -3 2 3 3
 -3 -3 -3 -3 2 6
 -3 -3 -3 -3 4 4
 -3 -3 -3 1 1 1 2
 -3 -3 -3 1 1 3
 -3 -3 -3 1 2 2
 -3 -3 -3 1 4
 -3 -3 -3 2 3
 -3 -3 1 1
 -3 -3 2
/*
    Kotlin Program for
    Find all distinct combinations of k sum in array
*/
class Combinations
{
	fun printArray(arr: Array < Int > , n: Int): Unit
	{
		print("\n Array : ");
		var i: Int = 0;
		while (i < n)
		{
			print(" " + arr[i]);
			i += 1;
		}
	}
	fun printCombination(
      data: MutableList < Int >  , 
      result : MutableList < String >  , 
      index : Int, count: Int, 
      k: Int, sum: Int, 
      ans: String): Unit
	{
		if (sum == k)
		{
			result.add(ans);
		}
		if (index >= data.size || count > data.size)
		{
			return;
		}
		var i: Int = index;
		while (i < data.size)
		{
			this.printCombination(
              data, result, i, 
              count + 1, k, 
              data[i] + sum, 
              ans + " " + data[i].toString());
			i += 1;
		}
	}
	fun distinctCombination(arr: Array < Int > , n: Int, k: Int): Unit
	{
		if (n <= 0)
		{
			return;
		}
		this.printArray(arr, n);
		// First sort given array
		arr.sort();
		// Auxiliary space 
		var data: MutableList < Int > = mutableListOf < Int > ();
		var result: MutableList < String > = mutableListOf < String > ();
		// Add first element
		data.add(arr[0]);
		var i: Int = 1;
		// Collect all distinct elements
		while (i < n)
		{
			if (arr[i] != arr[i - 1])
			{
				data.add(arr[i]);
			}
			i += 1;
		}
		// Print combinations
		this.printCombination(data, result, 0, 0, k, 0, "");
		print("\n Given k : " + k);
		print("\n Result : ");
		if (result.size == 0)
		{
			// When k sum  not exist
			print(" None \n");
		}
		else
		{
			print("\n");
			i = 0;
			// Display combination
			while (i < result.size)
			{
				println(result[i]);
				i += 1;
			}
		}
	}
}
fun main(args: Array < String > ): Unit
{
	val task: Combinations = Combinations();
	val arr1: Array < Int > = arrayOf(5, 2, 2, 1, 6, 3, 4);
	val arr2: Array < Int > = arrayOf(6, -3, 2, 3, 1, 4, 1);
	// Test A
	// Get the length of array
	var n: Int = arr1.count();
	// Sum k
	var k: Int = 7;
	// Test
	task.distinctCombination(arr1, n, k);
	// Test B
	// Get the length of array
	n = arr2.count();
	// Sum k
	k = -4;
	// Test
	task.distinctCombination(arr2, n, k);
}

Output

 Array :  5 2 2 1 6 3 4
 Given k : 7
 Result :
 1 1 1 1 1 1 1
 1 1 1 1 1 2
 1 1 1 1 3
 1 1 1 2 2
 1 1 1 4
 1 1 2 3
 1 1 5
 1 2 2 2
 1 2 4
 1 3 3
 1 6
 2 2 3
 2 5
 3 4

 Array :  6 -3 2 3 1 4 1
 Given k : -4
 Result :
 -3 -3 -3 -3 1 1 6
 -3 -3 -3 -3 1 3 4
 -3 -3 -3 -3 2 2 4
 -3 -3 -3 -3 2 3 3
 -3 -3 -3 -3 2 6
 -3 -3 -3 -3 4 4
 -3 -3 -3 1 1 1 2
 -3 -3 -3 1 1 3
 -3 -3 -3 1 2 2
 -3 -3 -3 1 4
 -3 -3 -3 2 3
 -3 -3 1 1
 -3 -3 2


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