From c381ecc03fe70acb4575c44f23918c14155f55e0 Mon Sep 17 00:00:00 2001
From: kg251gv <kamil.gejdos@student.tuke.sk>
Date: Wed, 4 Mar 2026 20:18:30 +0100
Subject: [PATCH] test

---
 a1/program.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)
 create mode 100644 a1/program.c

diff --git a/a1/program.c b/a1/program.c
new file mode 100644
index 0000000..d61f74f
--- /dev/null
+++ b/a1/program.c
@@ -0,0 +1,21 @@
+#include <stdio.h>
+
+int main(){
+    
+    int c= 0;
+    while(1){
+
+        c = getchar();
+        if (c < 0) break;
+
+        if (c >= 97 && c <= 122){
+            c = c - 'a' + 'A';
+        } else
+        if (c >= 65 && c <= 90){
+            c = c - 'A' + 'a';
+        }
+        putchar(c);
+    }
+
+    return 0;
+}
\ No newline at end of file