Merge remote-tracking branch 'origin/hw1' into hw1

hw1/task2/Cargo.toml

+[package]
+name = "task2"
+version = "0.1.0"
+authors = ["Lorenz Bung <lorenz.bung@googlemail.com>"]
+
+[dependencies]

hw1/task2/src/lib.rs

 pub fn square(n: u32) -> u64 {
-    unimplemented!()
+    println!(n)
+    n * n
 }
 
 
 pub fn total() -> u64 {
-    unimplemented!();
 }