diff --git a/cv1/program.c b/cv1/program.c
index 41d48b1..466e1f0 100644
--- a/cv1/program.c
+++ b/cv1/program.c
@@ -1,32 +1,26 @@
 #include <stdio.h>
+#include <ctype.h>
 
 int main() {
-    int c;
     int lines_count = 0;
+    int c;
 
     while ((c = getchar()) != EOF) {
-        // Check if the character is a lowercase letter
-        if (c >= 'a' && c <= 'z') {
-            // Convert lowercase to uppercase
-            c = c - 'a' + 'A';
+        if (islower(c)) {
+            putchar(toupper(c));
+        } else if (isupper(c)) {
+            putchar(tolower(c));
+        } else {
+            putchar(c);
+            if (c == '\n') {
+                lines_count++;
+            }
         }
-        // Check if the character is an uppercase letter
-        else if (c >= 'A' && c <= 'Z') {
-            // Convert uppercase to lowercase
-            c = c - 'A' + 'a';
-        }
-        // Check if the character is an end of line
-        else if (c == '\n') {
-            // Increment line count
-            lines_count++;
-        }
-
-        // Output the character
-        putchar(c);
     }
 
-    // Print the number of lines read
-    printf("Lines count: %d\n", lines_count);
+    printf("Počet načítaných riadkov: %d\n", lines_count);
 
     return 0;
-}
+    
+
+}
\ No newline at end of file