diff --git a/a1/program.c b/a1/program.c
index 4862fd5..c817323 100644
--- a/a1/program.c
+++ b/a1/program.c
@@ -1,6 +1,26 @@
 #include <stdio.h>
 // Tu môžte dopísať Vaše funkcie
 int main(){
-    // Tu píšete program
-    return 0;
+    int lines = 0;
+    int c = 0;
+    
+    while(1){
+    c = getchar();
+    
+    if(c == EOF){
+        break;
+    }
+    if(c == '\n'){
+        lines++;
+        putchar('\n');
+    }else if(c >= 'a' && c <= 'z'){
+        putchar(c - 'a' + 'A');
+    }else if(c >= 'A' && c <= 'Z'){
+        putchar(c - 'A' + 'a'); 
+    }else{
+        putchar(c);
+    }
 }
+    printf("Pocet riadkov: %d\n", lines);
+    return 0;
+}
\ No newline at end of file