Created
March 13, 2014 08:53
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| extern crate collections; | |
| use collections::HashSet; | |
| #[deriving(Eq, Hash)] | |
| struct XYZ { | |
| x: int, | |
| y: int, | |
| z: int | |
| } | |
| fn main() { | |
| let mut connected = HashSet::new(); | |
| let mut border = HashSet::new(); | |
| let middle = XYZ{x: 0, y: 0, z: 0}; | |
| border.insert(middle); | |
| while border.len() > 0 { | |
| let choice = *(border.iter().next().unwrap()); | |
| border.remove(&choice); | |
| connected.insert(choice); | |
| let cxp = XYZ{x: choice.x + 1, y: choice.y, z: choice.z}; | |
| let cxm = XYZ{x: choice.x - 1, y: choice.y, z: choice.z}; | |
| let cyp = XYZ{x: choice.x, y: choice.y + 1, z: choice.z}; | |
| let cym = XYZ{x: choice.x, y: choice.y - 1, z: choice.z}; | |
| let czp = XYZ{x: choice.x, y: choice.y, z: choice.z + 1}; | |
| let czm = XYZ{x: choice.x, y: choice.y, z: choice.z - 1}; | |
| if !connected.contains(&cxp) { | |
| border.insert(cxp); | |
| } | |
| if !connected.contains(&cxm){ | |
| border.insert(cxm); | |
| } | |
| if !connected.contains(&cyp){ | |
| border.insert(cyp); | |
| } | |
| if !connected.contains(&cym) { | |
| border.insert(cym); | |
| } | |
| if !connected.contains(&czp){ | |
| border.insert(czp); | |
| } | |
| if !connected.contains(&czm) { | |
| border.insert(czm); | |
| } | |
| } | |
| } |
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