#include<stdio.h>

int main()
{
    int n;
    int val[10];
    int seen[10]={1000,1000,1000,1000,1000,1000,1000,1000,1000,1000};
    int c=0;
    scanf("%d",&n);
    
    if(n<0){
        printf("Invalid input");
        return 0;     
    }
    else{
    for(int i=0;i<n;i++){
        scanf("%d",&val[i]);
    }
    
    for(int i=0;i<n;i++){
        if(val[i] ==seen[i-1] && i-1>=0){
            c+=1
        continue;
    }   seen[i-c]=val[i];
        
        
    }
    }
    for(int i=0;i<=n;i++)
    {if(seen[i]==1000){
        continue;
    }
        printf("%d ",seen[i]);
    }
    return 0;
}