#include<stdio.h>
int main(){
    int size,top=-1,i,num;
    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 unique[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;
}