// editor1
#include <stdio.h>
#include <stdlib.h>
int main() {
    int n;
    scanf("%d",&n);
    
    if (n<0){
        printf("Invalid Input\n");
        return 0;
    }
    int arr[n];
    for (int i=0; i<n;i++) {
        scanf("%d",&arr[i]);
    } 
    int result[n], size = 0;
    for (int i=0;i<n;i++) {
        int found=0;
        for (int j=0;j< size;j++){
            if (arr[i]==result[j]){
                found=1;
                break;
            }
        }
            if (!found){
                result[size++] = arr[i];
            }
        }
    for (int i =0; i<size;i++){
        printf("%d",result[i]);
        if(i<size-1) printf("");
       }
    }
    printf("\n");
    
    return 0;
    
}