diff --git a/libft/ft_lstadd.c b/libft/ft_lstadd.c
index 068fdaf3..e9042877 100644
--- a/libft/ft_lstadd.c
+++ b/libft/ft_lstadd.c
@@ -2,9 +2,6 @@
 
 void	ft_lstadd(t_list **alst, t_list *new)
 {
-	if (new)
-	{
-		new->next = *alst;
-		*alst = new;
-	}
+	new->next = *alst;
+	*alst = new;
 }
diff --git a/libft/ft_lsteadd.c b/libft/ft_lsteadd.c
new file mode 100644
index 00000000..3b9e391f
--- /dev/null
+++ b/libft/ft_lsteadd.c
@@ -0,0 +1,16 @@
+#include "libft.h"
+
+void	ft_lsteadd(t_list **alst, t_list *new)
+{
+	t_list	*lst;
+
+	lst = *alst;
+	if (lst)
+	{
+		while (lst->next)
+			lst = lst->next;
+		lst->next = new;
+	}
+	else
+		*alst = new;
+}
diff --git a/libft/ft_lstlast.c b/libft/ft_lstlast.c
new file mode 100644
index 00000000..5115a1fe
--- /dev/null
+++ b/libft/ft_lstlast.c
@@ -0,0 +1,8 @@
+#include "libft.h"
+
+t_list	*ft_lstlast(t_list *lst)
+{
+	while (lst->next)
+		lst = lst->next;
+	return (lst);
+}
diff --git a/libft/ft_lstnadd.c b/libft/ft_lstnadd.c
new file mode 100644
index 00000000..7db6c631
--- /dev/null
+++ b/libft/ft_lstnadd.c
@@ -0,0 +1,23 @@
+#include "libft.h"
+
+void	ft_lstnadd(t_list **alst, t_list *new, int n)
+{
+	t_list	*lst;
+	int		i;
+
+	lst = *alst;
+	if (lst)
+	{
+		i = 0;
+		while (lst->next && i < n)
+		{
+			lst = lst->next;
+			i++;
+		}
+		while (lst->next)
+			lst = lst->next;
+		lst->next = new;
+	}
+	else
+		*alst = new;
+}
diff --git a/libft/libft.h b/libft/libft.h
index 87ba3de0..c2e95ece 100644
--- a/libft/libft.h
+++ b/libft/libft.h
@@ -76,5 +76,8 @@ void	ft_putnbr_fd(int n, int fd);
 
 t_list	*ft_lstnew(void const *content, size_t content_size);
 void	ft_lstadd(t_list **alst, t_list *new);
+void	ft_lsteadd(t_list **alst, t_list *new);
+void	ft_lstnadd(t_list **alst, t_list *new, int n);
+t_list	*ft_lstlast(t_list *lst)
 
 #endif