#include<stdio.h>
int main(){
    int n;
    scanf("%d",&n);
    if(n<0){
        printf("Invalid input");
        return 0;
    }
    int arr[n];
    for(int i = 0; i<n; i++){
        scanf("%d",&arr[i]);
    }
    for(int j = 0; j<i; j++){
        if(arr[i] == arr[j]){
            is Duplicate = 1;
            break;
        }
    }
    if(isDuplicate == 0){
        printf(" %d",arr[i]);
    }
}
return 0;
}