diff --git a/A0/file b/A0/file
index 553c19c..d2e5309 100755
Binary files a/A0/file and b/A0/file differ
diff --git a/A0/file.c b/A0/file.c
index 9d9d7cc..0106c1d 100644
--- a/A0/file.c
+++ b/A0/file.c
@@ -9,22 +9,25 @@ enum FileType{ASCII, ISO, UTF, data};
 bool is_utf8(FILE* f) {
     rewind(f);
     char byte;
-    bool utf8_byte;
-    int char_length;
+    int char_length = -1;
     for (;;) {
         if (fread(&byte, 1, 1, f) == 0) {
             break;
         }
-        utf8_byte = true;
-        for (int j = 0 ; 1 ; j++) {
+        for (int j = 0 ; j <= 8 ; j++) {
             if (byte >> 7 == 0) {
-                char_length = max(j, 1);
+                char_length = j;
                 break;
             }
             byte = byte << 1;
         }
+        if (char_length == -1) {
+            return false;
+        }
         for (int i = 1 ; i < char_length ; i++) {
-            printf("esnathusrcaho");
+            if (fread(&byte, 1, 1, f) == 0 || byte >> 6 != 2) {
+                return false;
+            }
         }
     }
     return true;