// ConsoleApplication2.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#define MAX_SIZE 100

int main()
{
    int arr[MAX_SIZE], freq[MAX_SIZE];
    int size, i, j, count;

    printf("size:");
    scanf_s("%d", &size);
    printf("elements:");
    for (i = 0; i<size; i++)
    {
        scanf_s("%d", &arr[i]);
        freq[i] = -1;
    }

    /* тут считается к-во повторений элемента */
    for (i = 0; i<size; i++)
    {
        count = 1;
        for (j = i + 1; j<size; j++)
        {
            if (arr[i] == arr[j])
            {
                count++;
                freq[j] = 0;
            }
        }

        if (freq[i] != 0)
        {
            freq[i] = count;
        }
    }

    printf("\n unique: ");
    for (i = 0; i<size; i++)
    {
        if (freq[i] == 1)
        {
            printf("%d ", arr[i]);
        }
    }

    return 0;
}