diff --git a/cv1/program.c b/cv1/program.c
index 466e1f0..05af661 100644
--- a/cv1/program.c
+++ b/cv1/program.c
@@ -1,26 +1,26 @@
 #include <stdio.h>
-#include <ctype.h>
 
 int main() {
-    int lines_count = 0;
     int c;
+    int lines = 0;
 
     while ((c = getchar()) != EOF) {
-        if (islower(c)) {
-            putchar(toupper(c));
-        } else if (isupper(c)) {
-            putchar(tolower(c));
-        } else {
+        if (c >= 'a' && c <= 'z') {
+            c -= 32;
+        } else if (c >= 'A' && c <= 'Z') {
+            c += 32;
+        }
+
+        if (c == '\n') {
+            lines++;
+        }
+
+        if (c >= 32 && c <= 126) {
             putchar(c);
-            if (c == '\n') {
-                lines_count++;
-            }
         }
     }
 
-    printf("Počet načítaných riadkov: %d\n", lines_count);
+    printf("\nPočet načítaných riadkov: %d\n", lines);
 
     return 0;
-    
-
-}
\ No newline at end of file
+}