#include<stdio.h>
int main(){
    int size,i,num,top=-1,j;
    scanf("%d",&size);
    if(size<0){
        printf("Invalid input");
        return 0;
    }
    int arr[size];
    for(i=0;i<size;i++){
        scanf("%d",&num);
        arr[++top]=num;
    }
    int umique[size],ucount=0;
    for(i=0;i<=top;i++){
        int found=0;
        for(j=0;j<ucount;j++){
            if(unique[j]==arr[i]){
                found =1;
            }
        }
        if(found==0){
            unique[ucount++]=arr[i];
        }
    }
    for(i=0;i<ucount;i++){
        printf("%d\n",unique[i]);
    }
    return 0;
}