diff --git a/du1/Makefile b/du1/Makefile
new file mode 100644
index 0000000..8b13789
--- /dev/null
+++ b/du1/Makefile
@@ -0,0 +1 @@
+
diff --git a/du1/Makefile.c b/du1/Makefile.c
new file mode 100644
index 0000000..e69de29
diff --git a/du1/program b/du1/program
new file mode 100755
index 0000000..c6d4661
Binary files /dev/null and b/du1/program differ
diff --git a/du1/program.c b/du1/program.c
index d00491f..e3cb97f 100644
--- a/du1/program.c
+++ b/du1/program.c
@@ -1 +1,34 @@
-1
+#include <stdlib.h>
+#include <stdio.h>
+#include <ctype.h>
+
+int main(){
+  int counter;
+  printf("Enter a number: ");
+  scanf("%d",&counter);
+  printf("\nPočet riadkov: %d\n",counter);
+  int i= 0;
+  int decrypted_string();
+  while(1){
+      i = getchar(); 
+      if(decrypted_string[i]>='a' && decrypted_string[i]<='z'){
+            decrypted_string[i]-=32;
+        }
+      if(decrypted_string[i]>='A' && decrypted_string[i]<='Z'){
+            decrypted_string[i]+=32;
+        }
+      
+        putchar(i);
+        i++;
+      }  
+}
+
+
+
+
+/*for(int i=0; decrypted_string[i]!='\0'; i++){
+        if(decrypted_string[i]>='a' && decrypted_string[i]<='z'){
+            decrypted_string[i]-=32;
+        }
+    }
+*/