void AddFront(char nama[], int umur){
	curr=(struct data*)malloc(sizeof(struct data));
	strcpy(curr->nama, nama);
	curr->umur=umur;
	curr->next=curr->prev=NULL;

	if(head==NULL)
	head=tail=curr;

	else{
		curr->next=head;
		head->prev=curr;
		head=curr;
	}
}

void AddBack(char nama[], int umur){
	curr=(struct data*)malloc(sizeof(struct data));
	strcpy(curr->nama, nama);
	curr->umur=umur;
	curr->next=curr->prev=NULL;

	if(head==NULL)
	head=tail=curr;

	else{
		curr->prev=tail;
		tail->next=curr;
		tail=curr;
	}
}

void AddMid(char nama[], int umur){							//Ascending
	data *temp;
	curr=(struct data*)malloc(sizeof(struct data));
	strcpy(curr->nama, nama);
	curr->umur=umur;
	curr->next=curr->prev=NULL;

	if(head==NULL)
	head=tail=curr;
	else if(head->umur > curr->umur)
	AddFront(nama, umur);
	else if(tail->umur < curr->umur)
	AddBack(nama, umur);
	else{

	}