From 02481656966b0a8dfc95cf3c22bcc049660ff7d4 Mon Sep 17 00:00:00 2001
From: Federico Igne <git@federicoigne.com>
Date: Sat, 26 Dec 2020 17:48:38 +0000
Subject: Move Rust exercises in a subdirectory

---
 grains/src/lib.rs | 23 -----------------------
 1 file changed, 23 deletions(-)
 delete mode 100644 grains/src/lib.rs

(limited to 'grains/src/lib.rs')

diff --git a/grains/src/lib.rs b/grains/src/lib.rs
deleted file mode 100644
index 05449be..0000000
--- a/grains/src/lib.rs
+++ /dev/null
@@ -1,23 +0,0 @@
-pub fn square(s: u32) -> u64 {
-    assert!(s > 0 && s < 65,"Square must be between 1 and 64");
-    2_u64.pow(s-1)
-}
-
-/// This version uses the already defined `square(s)` function.
-///
-/// There is also a faster way to compute this according to
-/// [Wolfram|Alpha](https://www.wolframalpha.com/input/?i=sum_0%5En+2%5En)
-///
-/// 2_u64.pow(65) - 1 == 18_446_744_073_709_551_615
-///
-/// this solution however doesn't work because
-///
-/// 2_u64.pow(65) == 18_446_744_073_709_551_616
-///
-/// which overflows since
-///
-/// std::u64::MAX == 18_446_744_073_709_551_615
-///
-pub fn total() -> u64 {
-    (1..65).map(square).sum() // std::u64::MAX
-}
-- 
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