diff --git a/.gitignore b/.gitignore
index a799c93..9d11296 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,3 @@
 build
 obj
+.config
\ No newline at end of file
diff --git a/Makefile b/Makefile
index ae81e54..3c0cd7c 100644
--- a/Makefile
+++ b/Makefile
@@ -17,6 +17,11 @@ TESTS_SRCS = $(wildcard $(TESTS_DIR)/*.c)
 TESTS_OBJS = $(patsubst $(TESTS_DIR)/%.c,$(OBJ_DIR)/%.test.o,$(TESTS_SRCS))
 TESTS_BINS = $(patsubst $(TESTS_DIR)/%.c,$(BUILD_DIR)/%_test,$(TESTS_SRCS))
 
+# Flags for configuration
+CONFIG_FLAGS := $(shell grep -E '^[a-zA-Z0-9_]+=' .config | sed 's/\([A-Za-z0-9_]*\)=y/-D\1=1/;s/\([A-Za-z0-9_]*\)=n/-D\1=0/')
+CFLAGS += $(CONFIG_FLAGS)
+
+
 all: $(LIBRARY)
 
 $(OBJ_DIR) $(BUILD_DIR):
@@ -59,3 +64,12 @@ fclean: clean
 re: fclean all
 
 .PHONY: all clean fclean re tests
+
+CONFIG_FILE := .config
+
+genconfig:
+	@echo -e "  C\t${CONFIG_FILE}"
+	@echo "USE_SLIST=y"  >  $(CONFIG_FILE)
+	@echo "USE_DLIST=y"  >> $(CONFIG_FILE)
+	@echo "USE_STACK=y"  >> $(CONFIG_FILE)
+
diff --git a/hdrs/libft.h b/hdrs/libft.h
index 842c72a..f572d16 100644
--- a/hdrs/libft.h
+++ b/hdrs/libft.h
@@ -1,7 +1,14 @@
 #ifndef LIBFT_H
-# define LIBFT_H
-
-# include <stdlib.h>
+#define LIBFT_H
+#include <stdlib.h>
+#if DEBUG
+#include <stdio.h>
+#define DEBUG_PRINT(fmt, ...) \
+    fprintf(stderr, "[DEBUG] %s:%d:%s(): " fmt "\n", \
+            __FILE__, __LINE__, __func__, ##__VA_ARGS__)
+#else
+#define DEBUG_PRINT(fmt, ...) ((void)0)
+#endif
 
 void *ft_realloc(void *ptr, size_t old_size, size_t new_size);
 
@@ -49,29 +56,30 @@ typedef struct s_string
     char *data;
 } t_string;
 
-/* List */
-typedef struct s_list
+/* Single Linked List */
+#if USE_SLIST
+typedef struct s_slist
 {
     void *data;
-    struct s_list *next;
-} t_list;
+    struct s_slist *next;
+} t_slist;
 
-/* List functions */
-t_list *ft_lstnew(void *data);
-void ft_lstpush(t_list **lst, t_list *node);
-void ft_lstunshift(t_list **lst, t_list *node);
-t_list *ft_lstpop(t_list **lst);
-t_list *ft_lstshift(t_list **lst);
-int ft_lstsize(t_list *lst);
-void ft_lstclear(t_list **lst);
-void ft_lstreverse(t_list **lst);
-int ft_lstempty(t_list *lst);
-void ft_lstiter(t_list *lst, void (*f)(void *));
-void ft_lstrm(t_list **lst, void *data, int (*cmp)(void *, void *), void (*del)(void *));
-t_list *ft_lstfind(t_list *lst, void *data, int (*cmp)(void *, void *));
-int ft_lstinsert(t_list **lst, t_list *node, int index);
-t_list *ft_lstget(t_list *lst, int index);
+t_slist *ft_slist_new(void *data);
+void ft_slist_push(t_slist **lst, t_slist *node);
+void ft_slist_unshift(t_slist **lst, t_slist *node);
+t_slist *ft_slist_pop(t_slist **lst);
+t_slist *ft_slist_shift(t_slist **lst);
+int ft_slist_size(t_slist *lst);
+void ft_slist_clear(t_slist **lst);
+void ft_slist_reverse(t_slist **lst);
+int ft_slist_empty(t_slist *lst);
+void ft_slist_iter(t_slist *lst, void (*f)(void *));
+void ft_slist_rm(t_slist **lst, void *data, int (*cmp)(void *, void *), void (*del)(void *));
+t_slist *ft_slist_find(t_slist *lst, void *data, int (*cmp)(void *, void *));
+int ft_slist_insert(t_slist **lst, t_slist *node, int index);
+t_slist *ft_slist_get(t_slist *lst, int index);
 
+#endif 
 /* Vector */
 typedef struct s_vec
 {  
diff --git a/srcs/lst/ft_lstempty.c b/srcs/lst/ft_lstempty.c
deleted file mode 100644
index 84d5e21..0000000
--- a/srcs/lst/ft_lstempty.c
+++ /dev/null
@@ -1,6 +0,0 @@
-#include "libft.h"
-
-int ft_lstempty(t_list *lst)
-{
-    return (lst == NULL);
-}
\ No newline at end of file
diff --git a/srcs/lst/ft_lstclear.c b/srcs/slist/ft_slist_clear.c
similarity index 66%
rename from srcs/lst/ft_lstclear.c
rename to srcs/slist/ft_slist_clear.c
index 5d736dd..71e8b17 100644
--- a/srcs/lst/ft_lstclear.c
+++ b/srcs/slist/ft_slist_clear.c
@@ -1,13 +1,15 @@
+#if USE_SLIST
 #include "libft.h"
 #include <stdlib.h>
 
-void ft_lstclear(t_list **lst)
+void ft_slist_clear(t_slist **lst)
 {
-    t_list *tmp;
+    t_slist *tmp;
     while (lst && *lst)
     {
         tmp = (*lst)->next;
         free(*lst);
         *lst = tmp;
     }
-}
\ No newline at end of file
+}
+#endif
\ No newline at end of file
diff --git a/srcs/slist/ft_slist_empty.c b/srcs/slist/ft_slist_empty.c
new file mode 100644
index 0000000..cdcfa20
--- /dev/null
+++ b/srcs/slist/ft_slist_empty.c
@@ -0,0 +1,8 @@
+#if USE_SLIST
+#include "libft.h"
+
+int ft_slist_empty(t_slist *lst)
+{
+    return (lst == NULL);
+}
+#endif
\ No newline at end of file
diff --git a/srcs/lst/ft_lstfind.c b/srcs/slist/ft_slist_find.c
similarity index 61%
rename from srcs/lst/ft_lstfind.c
rename to srcs/slist/ft_slist_find.c
index aff4f59..423bc94 100644
--- a/srcs/lst/ft_lstfind.c
+++ b/srcs/slist/ft_slist_find.c
@@ -1,6 +1,7 @@
+#if USE_SLIST
 #include "libft.h"
 
-t_list *ft_lstfind(t_list *lst, void *data, int (*cmp)(void *, void *))
+t_slist *ft_slist_find(t_slist *lst, void *data, int (*cmp)(void *, void *))
 {
     while (lst)
     {
@@ -9,4 +10,5 @@ t_list *ft_lstfind(t_list *lst, void *data, int (*cmp)(void *, void *))
         lst = lst->next;
     }
     return (NULL);
-}
\ No newline at end of file
+}
+#endif
\ No newline at end of file
diff --git a/srcs/lst/ft_lstget.c b/srcs/slist/ft_slist_get.c
similarity index 70%
rename from srcs/lst/ft_lstget.c
rename to srcs/slist/ft_slist_get.c
index f2f5dc1..af4bda8 100644
--- a/srcs/lst/ft_lstget.c
+++ b/srcs/slist/ft_slist_get.c
@@ -1,6 +1,7 @@
+#if USE_SLIST
 #include "libft.h"
 
-t_list *ft_lstget(t_list *lst, int index)
+t_slist *ft_slist_get(t_slist *lst, int index)
 {
     int i = 0;
     while (lst && i < index)
@@ -10,3 +11,4 @@ t_list *ft_lstget(t_list *lst, int index)
     }
     return ((i == index) ? lst : NULL);
 }
+#endif
\ No newline at end of file
diff --git a/srcs/lst/ft_lstinsert.c b/srcs/slist/ft_slist_insert.c
similarity index 75%
rename from srcs/lst/ft_lstinsert.c
rename to srcs/slist/ft_slist_insert.c
index dae06da..9286ac1 100644
--- a/srcs/lst/ft_lstinsert.c
+++ b/srcs/slist/ft_slist_insert.c
@@ -1,9 +1,10 @@
+#if USE_SLIST
 #include "libft.h"
 
-int ft_lstinsert(t_list **lst, t_list *node, int index)
+int ft_slist_insert(t_slist **lst, t_slist *node, int index)
 {
-    t_list *curr = *lst;
-    t_list *prev = NULL;
+    t_slist *curr = *lst;
+    t_slist *prev = NULL;
     int i = 0;
 
     if (index < 0 || !node)
@@ -28,3 +29,4 @@ int ft_lstinsert(t_list **lst, t_list *node, int index)
     }
     return (-1);
 }
+#endif
\ No newline at end of file
diff --git a/srcs/lst/ft_lstiter.c b/srcs/slist/ft_slist_iter.c
similarity index 57%
rename from srcs/lst/ft_lstiter.c
rename to srcs/slist/ft_slist_iter.c
index 4556347..ed64e52 100644
--- a/srcs/lst/ft_lstiter.c
+++ b/srcs/slist/ft_slist_iter.c
@@ -1,6 +1,7 @@
+#if USE_SLIST
 #include "libft.h"
 
-void ft_lstiter(t_list *lst, void (*f)(void *))
+void ft_slist_iter(t_slist *lst, void (*f)(void *))
 {
     while (lst)
     {
@@ -8,3 +9,4 @@ void ft_lstiter(t_list *lst, void (*f)(void *))
         lst = lst->next;
     }
 }
+#endif
\ No newline at end of file
diff --git a/srcs/lst/ft_lstnew.c b/srcs/slist/ft_slist_new.c
similarity index 52%
rename from srcs/lst/ft_lstnew.c
rename to srcs/slist/ft_slist_new.c
index 37f210b..63ff49d 100644
--- a/srcs/lst/ft_lstnew.c
+++ b/srcs/slist/ft_slist_new.c
@@ -1,8 +1,9 @@
+#if USE_SLIST
 #include "libft.h"
 
-t_list *ft_lstnew(void *data)
+t_slist *ft_slist_new(void *data)
 {
-    t_list *node = (t_list *)malloc(sizeof(t_list));
+    t_slist *node = (t_slist *)malloc(sizeof(t_slist));
 
     if (!node)
         return (NULL);
@@ -11,4 +12,5 @@ t_list *ft_lstnew(void *data)
     node->next = NULL;
 
     return node;
-}
\ No newline at end of file
+}
+#endif
\ No newline at end of file
diff --git a/srcs/lst/ft_lstpop.c b/srcs/slist/ft_slist_pop.c
similarity index 76%
rename from srcs/lst/ft_lstpop.c
rename to srcs/slist/ft_slist_pop.c
index 40dd665..a7bb9f6 100644
--- a/srcs/lst/ft_lstpop.c
+++ b/srcs/slist/ft_slist_pop.c
@@ -1,9 +1,10 @@
+#if USE_SLIST
 #include "libft.h"
 
-t_list *ft_lstpop(t_list **lst)
+t_slist *ft_list_pop(t_slist **lst)
 {
-    t_list *current;
-    t_list *prev;
+    t_slist *current;
+    t_slist *prev;
 
     if (!lst || !*lst)
         return NULL;
@@ -21,3 +22,4 @@ t_list *ft_lstpop(t_list **lst)
     prev->next = NULL;
     return current;
 }
+#endif
\ No newline at end of file
diff --git a/srcs/lst/ft_lstpush.c b/srcs/slist/ft_slist_push.c
similarity index 75%
rename from srcs/lst/ft_lstpush.c
rename to srcs/slist/ft_slist_push.c
index 1d87cf4..9e63ddd 100644
--- a/srcs/lst/ft_lstpush.c
+++ b/srcs/slist/ft_slist_push.c
@@ -1,8 +1,9 @@
+#if USE_SLIST
 #include "libft.h"
 
-void ft_lstpush(t_list **lst, t_list *node)
+void ft_slist_push(t_slist **lst, t_slist *node)
 {
-    t_list *current;
+    t_slist *current;
 
     if (!lst || !node)
         return;
@@ -20,3 +21,4 @@ void ft_lstpush(t_list **lst, t_list *node)
         current = current->next;
     current->next = node;
 }
+#endif
\ No newline at end of file
diff --git a/srcs/lst/ft_lstreverse.c b/srcs/slist/ft_slist_reverse.c
similarity index 56%
rename from srcs/lst/ft_lstreverse.c
rename to srcs/slist/ft_slist_reverse.c
index af8b57d..f5532f9 100644
--- a/srcs/lst/ft_lstreverse.c
+++ b/srcs/slist/ft_slist_reverse.c
@@ -1,10 +1,11 @@
+#if USE_SLIST
 #include "libft.h"
 
-void ft_lstreverse(t_list **lst)
+void ft_slist_reverse(t_slist **lst)
 {
-    t_list *prev = NULL;
-    t_list *curr = *lst;
-    t_list *next;
+    t_slist *prev = NULL;
+    t_slist *curr = *lst;
+    t_slist *next;
 
     while (curr)
     {
@@ -15,3 +16,4 @@ void ft_lstreverse(t_list **lst)
     }
     *lst = prev;
 }
+#endif
\ No newline at end of file
diff --git a/srcs/lst/ft_lstrm.c b/srcs/slist/ft_slist_rm.c
similarity index 69%
rename from srcs/lst/ft_lstrm.c
rename to srcs/slist/ft_slist_rm.c
index f129f75..86e6d18 100644
--- a/srcs/lst/ft_lstrm.c
+++ b/srcs/slist/ft_slist_rm.c
@@ -1,9 +1,10 @@
+#if USE_SLIST
 #include "libft.h"
 
-void ft_lstrm(t_list **lst, void *data, int (*cmp)(void *, void *), void (*del)(void *))
+void ft_slist_rm(t_slist **lst, void *data, int (*cmp)(void *, void *), void (*del)(void *))
 {
-    t_list *curr = *lst;
-    t_list *prev = NULL;
+    t_slist *curr = *lst;
+    t_slist *prev = NULL;
 
     while (curr)
     {
@@ -21,4 +22,5 @@ void ft_lstrm(t_list **lst, void *data, int (*cmp)(void *, void *), void (*del)(
         prev = curr;
         curr = curr->next;
     }
-}
\ No newline at end of file
+}
+#endif
\ No newline at end of file
diff --git a/srcs/lst/ft_lstshift.c b/srcs/slist/ft_slist_shift.c
similarity index 65%
rename from srcs/lst/ft_lstshift.c
rename to srcs/slist/ft_slist_shift.c
index 7a43812..3e40019 100644
--- a/srcs/lst/ft_lstshift.c
+++ b/srcs/slist/ft_slist_shift.c
@@ -1,8 +1,9 @@
+#if USE_SLIST
 #include "libft.h"
 
-t_list *ft_lstshift(t_list **lst)
+t_slist *ft_slist_shift(t_slist **lst)
 {
-    t_list *first;
+    t_slist *first;
 
     if (!lst || !*lst)
         return NULL;
@@ -11,3 +12,4 @@ t_list *ft_lstshift(t_list **lst)
     first->next = NULL;
     return first;
 }
+#endif
\ No newline at end of file
diff --git a/srcs/lst/ft_lstsize.c b/srcs/slist/ft_slist_size.c
similarity index 71%
rename from srcs/lst/ft_lstsize.c
rename to srcs/slist/ft_slist_size.c
index 2327fe0..27ba999 100644
--- a/srcs/lst/ft_lstsize.c
+++ b/srcs/slist/ft_slist_size.c
@@ -1,6 +1,7 @@
+#if USE_SLIST
 #include "libft.h"
 
-int ft_lstsize(t_list *lst)
+int ft_slist_size(t_slist *lst)
 {
     int size = 0;
     while (lst)
@@ -10,3 +11,4 @@ int ft_lstsize(t_list *lst)
     }
     return size;
 }
+#endif
\ No newline at end of file
diff --git a/srcs/lst/ft_lstunshift.c b/srcs/slist/ft_slist_unshift.c
similarity index 58%
rename from srcs/lst/ft_lstunshift.c
rename to srcs/slist/ft_slist_unshift.c
index 8d78989..5e2a459 100644
--- a/srcs/lst/ft_lstunshift.c
+++ b/srcs/slist/ft_slist_unshift.c
@@ -1,9 +1,11 @@
+#if USE_SLIST
 #include "libft.h"
 
-void ft_lstunshift(t_list **lst, t_list *node)
+void ft_slist_unshift(t_slist **lst, t_slist *node)
 {
     if (!lst || !node)
         return;
     node->next = *lst;
     *lst = node;
 }
+#endif
\ No newline at end of file