# Print sorted distinct elements of array

Given an array that might contain duplicates, print all distinct elements in sorted order.

Examples:

Input  : 1, 3, 2, 2, 1
Output : 1 2 3

Input  : 1, 1, 1, 2, 2, 3
Output : 1 2 3

## Recommended: Please try your approach on {IDE} first, before moving on to the solution.

Simple Solution is to sort the array first, then traverse the array and print only first occurrences of elements.

Another Approach is to use set in C++ STL.

## C++

 // CPP program to print sorted distinct // elements. #include using namespace std;    void printRepeating(int arr[], int size) {     // Create a set using array elements     set s(arr, arr + size);        // Print contents of the set.     for (auto x : s)          cout << x << " "; }    // Driver code int main() {     int arr[] = { 1, 3, 2, 2, 1 };     int n = sizeof(arr) / sizeof(arr[0]);     printRepeating(arr, n);     return 0; }

## Java

 // Java program to print sorted distinct // elements. import java.io.*; import java.util.*;    public class GFG {             static void printRepeating(Integer []arr, int size)     {         // Create a set using array elements         SortedSet s = new TreeSet<>();         Collections.addAll(s, arr);                    // Print contents of the set.         System.out.print(s);     }             // Driver code     public static void main(String args[])     {         Integer []arr = {1, 3, 2, 2, 1};         int n = arr.length;         printRepeating(arr, n);     } }     // This code is contributed by // Manish Shaw (manishshaw1)

## Python3

 # Python3 program to print  # sorted distinct elements.    def printRepeating(arr,size):        # Create a set using array elements      s = set()     for i in range(size):         if arr[i] not in s:             s.add(arr[i])        # Print contents of the set.     for i in s:         print(i,end=" ")    # Driver code if __name__=='__main__':     arr = [1,3,2,2,1]     size = len(arr)     printRepeating(arr,size)    # This code is contributed by  # Shrikant13

## C#

 // C# program to print sorted distinct // elements. using System; using System.Collections.Generic; using System.Linq;    class GFG {            static void printRepeating(int []arr, int size)     {         // Create a set using array elements         SortedSet s = new SortedSet(arr);                // Print contents of the set.         foreach (var n in s)         {             Console.Write(n + " ");         }      }            // Driver code     public static void Main()     {         int []arr = {1, 3, 2, 2, 1};         int n = arr.Length;         printRepeating(arr, n);     } }    // This code is contributed by // Manish Shaw (manishshaw1)

Output:

1 2 3

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Improved By : manishshaw1, shrikanth13

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