#include <stdio.h>
int main (){
    int N;
    scanf("%d",&N);
    int arr [N];
    for (int i=0;i<N;i++){
    scanf("%d",&arr[i]);
}
int duplicate[N];
int dupCount=0;
for(int i=0;i<N;i++){
for (int j=i+1;j<N;j++){
    if (arr[i]==arr[j]){
        int alreadyAdded = 0;
        for(i)
    }
}