diff --git a/src/lib/list.c b/src/lib/list.c
index 50858a1..ace0c2c 100644
--- a/src/lib/list.c
+++ b/src/lib/list.c
@@ -43,6 +43,19 @@ int list_size(const void *list_ptr) {
     return list->size;
 }
 
+int list_find(void *list_ptr, void *elem) {
+    list_meta_t *list = (void *) ((unsigned char *) list_ptr - sizeof(list_meta_t));
+    unsigned char *array = list_ptr;
+
+    for (int i = 0; i < list->size; i++) {
+        if (memcmp(array + i * list->elem_size, elem, list->elem_size) == 0) {
+            return i;
+        }
+    }
+
+    return -1;
+}
+
 void *list_insert(void *list_ptr, void *elem, int n) {
     void *ptr = NULL;
     list_ptr = list_insert_ptr(list_ptr, &ptr, n);
@@ -94,7 +107,7 @@ void *list_remove(void *list_ptr, int n) {
         memmove(array + n * list->elem_size, array + (n + 1) * list->elem_size, (list->size - n - 1) * list->elem_size);
 
     list->size--;
-    if (list->size < list->max_size / FACTOR && list->max_size / FACTOR >= list->init_size) {
+    if (list->size < list->max_size / FACTOR / 2 && list->max_size / FACTOR >= list->init_size) {
         if ((list = list_resize(list, list->max_size / FACTOR)) == NULL) {
             return NULL;
         }
@@ -103,6 +116,15 @@ void *list_remove(void *list_ptr, int n) {
     return (unsigned char *) list + sizeof(list_meta_t);
 }
 
+void *list_delete(void *list_ptr, void *elem) {
+    int idx = list_find(list_ptr, elem);
+    if (idx == -1) {
+        return list_ptr;
+    } else {
+        return list_remove(list_ptr, idx);
+    }
+}
+
 void *list_clear(void *list_ptr) {
     list_meta_t *list = (void *) ((unsigned char *) list_ptr - sizeof(list_meta_t));
     list->size = 0;
diff --git a/src/lib/list.h b/src/lib/list.h
index 0d29c59..d778a48 100644
--- a/src/lib/list.h
+++ b/src/lib/list.h
@@ -6,6 +6,8 @@ void *list_create(int elem_size, int init_elem_n);
 
 int list_size(const void *list_ptr);
 
+int list_find(void *list_ptr, void *elem);
+
 void *list_insert(void *list_ptr, void *elem, int n);
 
 void *list_insert_ptr(void *list_ptr, void **elem, int n);
@@ -16,6 +18,8 @@ void *list_append_ptr(void *list_ptr, void **elem);
 
 void *list_remove(void *list_ptr, int n);
 
+void *list_delete(void *list_ptr, void *elem);
+
 void *list_clear(void *list_ptr);
 
 void list_free(void *list_ptr);