diff --git a/20181203/loesung-1.c b/20181203/loesung-1.c
new file mode 100644
index 0000000000000000000000000000000000000000..34fda0b454342a2a5a16e3cf12f77cf34bd7cdae
--- /dev/null
+++ b/20181203/loesung-1.c
@@ -0,0 +1,28 @@
+#include <stdio.h>
+
+#include "aufgabe-1.xbm"
+
+int main (void)
+{
+  int line_bytes = (aufgabe_1_width + 7) / 8;
+  for (int i = 0; i < aufgabe_1_height; i++)
+    {
+      unsigned char *p = aufgabe_1_bits + i * line_bytes;
+      unsigned char mask = 0x01;
+      for (int j = 0; j < aufgabe_1_width; j++)
+        {
+          if (*p & mask)
+            printf ("*");
+          else
+            printf (" ");
+          mask <<= 1;
+          if (!mask)
+            {
+              mask = 0x01;
+              p++;
+            }
+        }
+      printf ("\n");
+    }
+  return 0;
+}