Add Readme file for Rust implementation

Rust/README.md

@@ -0,0 +1,43 @@
+# N-Queens problem using backtracking and CS
+
+## Rust implementation
+
+### Set up
+
+```sh
+yum install rustc cargo
+cargo build --release
+```
+
+### Syntax
+
+```
+queens [-h] [-p] [SIZE]
+```
+
+<dl>
+  <dt>-h</dt>
+  <dd>Show help.</dd>
+  <dt>-p</dt>
+  <dd>Enable parallel mode.</dd>
+  <dt>SIZE</dt>
+  <dd>Length of the chess.</dd>
+</dl>
+
+### Example
+
+```
+# cargo run --release -- -p 4000
+
+Queen 1: square 1252
+Queen 2: square 2295
+(...)
+Queen 3999: square 3509
+Queen 4000: square 1655
+
+Trials:      58765
+Discards:    182326630
+Time:        4539 ms.
+Performance: 0.013 steps/μs.
+             40.167 discards/μs.
+```