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-rw-r--r--foursquare.c13
1 files changed, 12 insertions, 1 deletions
diff --git a/foursquare.c b/foursquare.c
index 9552ed4..c5ab68c 100644
--- a/foursquare.c
+++ b/foursquare.c
@@ -1,4 +1,15 @@
-// foursquare.c
+/*
+ * A Four Square cipher decoder. (Don't look directly at the mess)
+ *
+ * Copyright (C) 2014 Tomasz Kramkowski <tk@the-tk.com>
+ *
+ * This program is free software. It is licensed under version 3 of the
+ * GNU General Public License.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see [http://www.gnu.org/licenses/].
+ */
+
#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>