diff --git a/cv7/program.c b/cv7/program.c
index 0c69c32..8ebd22a 100644
--- a/cv7/program.c
+++ b/cv7/program.c
@@ -13,16 +13,13 @@ struct tree {
 struct tree* read_tree() {
     char buffer[SIZE];
     memset(buffer, 0, SIZE);
-
-    if (!fgets(buffer, SIZE, stdin) || buffer[0] == '\n') {
+    char* r = fgets(buffer, SIZE, stdin);
+    if (!r || buffer[0] == '\n') {
         return NULL;
     }
-
-    buffer[strcspn(buffer, "\n")] = 0;
-
-    struct tree* node = (struct tree*)calloc(1, sizeof(struct tree));
+    buffer[strcspn(buffer, "\n")] = 0; 
+    struct tree* node = calloc(1, sizeof(struct tree));
     strncpy(node->value, buffer, SIZE - 1);
-
     return node;
 }