1 // Copyright 2014 The Rust Project Developers. See the COPYRIGHT
2 // file at the top-level directory of this distribution and at
3 // http://rust-lang.org/COPYRIGHT.
5 // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
6 // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
7 // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
8 // option. This file may not be copied, modified, or distributed
9 // except according to those terms.
13 extern crate collections;
15 use collections::HashSet;
17 #[deriving(Eq, TotalEq, Hash)]
25 let mut connected = HashSet::new();
26 let mut border = HashSet::new();
28 let middle = XYZ{x: 0, y: 0, z: 0};
29 border.insert(middle);
31 while border.len() > 0 && connected.len() < 10000 {
32 let choice = *(border.iter().next().unwrap());
33 border.remove(&choice);
34 connected.insert(choice);
36 let cxp = XYZ{x: choice.x + 1, y: choice.y, z: choice.z};
37 let cxm = XYZ{x: choice.x - 1, y: choice.y, z: choice.z};
38 let cyp = XYZ{x: choice.x, y: choice.y + 1, z: choice.z};
39 let cym = XYZ{x: choice.x, y: choice.y - 1, z: choice.z};
40 let czp = XYZ{x: choice.x, y: choice.y, z: choice.z + 1};
41 let czm = XYZ{x: choice.x, y: choice.y, z: choice.z - 1};
43 if !connected.contains(&cxp) {
46 if !connected.contains(&cxm){
49 if !connected.contains(&cyp){
52 if !connected.contains(&cym) {
55 if !connected.contains(&czp){
58 if !connected.contains(&czm) {