diff --git a/du4 /snake.c b/du4 /snake.c
index 33af2c7..98f8b0d 100644
--- a/du4 /snake.c	
+++ b/du4 /snake.c	
@@ -24,8 +24,16 @@ struct snake* remove_snake(struct snake* snake){
 
 void free_snake(struct snake* sn)
 {
+
+}
+
+int is_snake(struct snake* snake,int x,int y){
+    if (snake == NULL)
+    {
+        return 1;
+    }
     //pomocna pointer premanna
-    struct snake* currentPtr = sn;
+    struct snake* currentPtr = snake;
     while (currentPtr != NULL)
     {
         //uloz dalsiu cast
@@ -33,9 +41,7 @@ void free_snake(struct snake* sn)
         free(currentPtr);
         currentPtr = nextPtr;
     }
-}
 
-int is_snake(struct snake* snake,int x,int y){
     return 0;
 }