diff --git a/cv1/program.c b/cv1/program.c
index 8079f00..9a0ebf4 100644
--- a/cv1/program.c
+++ b/cv1/program.c
@@ -1,11 +1,32 @@
 #include <stdio.h>
+#include <ctype.h>
 
-char simulate_caps_lock(char c) {
-    if ('a' <= c && c <= 'z') {
-        return c - ('a' - 'A');
-    } else if ('A' <= c && c <= 'Z') {
-        return c + ('a' - 'A');
-    } else {
-        return c;
+int main() {
+    char input_char;
+    int line_count = 0;
+
+    while (1) {
+        int read_result = scanf("%c", &input_char);
+
+        if (read_result == EOF) {
+            break;
+        }
+
+        if (islower(input_char)) {
+            printf("%c", toupper(input_char));
+        } else if (isupper(input_char)) {
+            printf("%c", tolower(input_char));
+        } else if (input_char == '\n') {
+            line_count++;
+            printf("%c", input_char);
+        } else if (isprint(input_char)) {
+            // Print visible characters as they are
+            printf("%c", input_char);
+        }
     }
+
+    printf("\nNumber of lines read: %d\n", line_count);
+
+    return 0;
 }
+