# Python 3 program to count unique elements
      def count(arr, n):
         # Mark all array elements as not visited
         visited = [False for i in range(n)]
         # Traverse through array elements
         # and count frequencies
         for i in range(n):
           # Skip this element if already
           # processed
           if (visited[i] == True):
              continue
           # Count frequency
           count = 1
           for j in range(i + 1, n, 1):
              if (arr[i] == arr[j]):
                visited[j] = True
                count += 1
           if count == 1 :
              print(arr[i]);
      # Driver Code
      arr = [10, 30, 40, 20, 10, 20, 50, 10]
      n = len(arr)
      count(arr, n)
      
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      Find non-repeating elements

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