#include <stdio.h>
int main() {
int arr[] = { 2, 4, 1, 2, 6, 4, 3, 3, 5, 7, 8, 9, 8 };
int size = sizeof(arr) / sizeof(arr[0]);
int j;
for (int i = 0; i < size; i++) {
for (j = 0; j < size; j++) {
if (arr[i] == arr[j] && i != j)
break;
}
if (j == size) {
printf("%d ", arr[i]);
}
}
return 0;
}
/*
run:
1 6 5 7 9
*/