license

2 files changed, 29 insertions, 0 deletions

diff --git a/README.md b/README.md
index 1394963..8d08e55 100644
--- a/README.md
+++ b/README.md
@@ -7,3 +7,5 @@ pi = pi + sin(pi)
 ```
 
 Usage: `./pi` - generate 100 digits of pi; `./pi n` - generate n digits of pi
+
+Takes time roughly proportional to n<sup>2</sup> to generate n digits.
diff --git a/main.c b/main.c
index 9fb724e..9d0d7c0 100644
--- a/main.c
+++ b/main.c
@@ -1,3 +1,30 @@
+/*
+This is free and unencumbered software released into the public domain.
+
+Anyone is free to copy, modify, publish, use, compile, sell, or
+distribute this software, either in source code form or as a compiled
+binary, for any purpose, commercial or non-commercial, and by any
+means.
+
+In jurisdictions that recognize copyright laws, the author or authors
+of this software dedicate any and all copyright interest in the
+software to the public domain. We make this dedication for the benefit
+of the public at large and to the detriment of our heirs and
+successors. We intend this dedication to be an overt act of
+relinquishment in perpetuity of all present and future rights to this
+software under copyright law.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR
+OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+OTHER DEALINGS IN THE SOFTWARE.
+
+For more information, please refer to <http://unlicense.org/>
+*/
+
 #include <gmp.h>
 #include <stdio.h>
 #include <stdint.h>