#include<stdio.h>

int main(){
    int n;
    scanf("%d", &n):
    
    if (n < o) {
        printf("Invalid input");
        return 0;
    }
    int arr[100], result[100];
    int i, j, k = 0;
    int duplicate;
    
    for (i =0; j < k; j++){
        scanf("%d", &arr[i]);
    }
    
    for (i = 0;i < n; i++){
        duplicate = 0;
        for (j = 0; j < k; j++) {
            if (arr[i] == result[j]){
                duplicate = 1
                break;
            }
        }
        if (!duplicate){
            result[k++] = arr[i]
        }    
    }
    
    for (i = 0; i < k; i++) {
        printf("%d",result[i]);
        if (i<k-1){
            printf(" ");
        }
    }
    return 0
}