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| //: Playground - noun: a place where people can play | |
| //: Roots of Unity Often Lie | |
| indirect enum BTree { | |
| case empty | |
| case branch(BTree, BTree) | |
| } | |
| func encode(_ t: (BTree, BTree, BTree, BTree, BTree, BTree, BTree)) -> BTree { | |
| switch t { | |
| case (.empty, .empty, .empty, .empty, .empty, .empty, .empty): | |
| return .branch(.empty, .empty) | |
| case let (.empty, .empty, .empty, .empty, .empty, .empty, .branch(b1, b2)): | |
| return .branch(.branch(.branch(.branch(.branch(.empty, .empty), .empty), b1), .empty), b2) | |
| case let (.empty, .empty, .empty, .empty, .empty, .branch(b1, b2), .empty): | |
| return .branch(.empty, .branch(b1, b2)) | |
| case let (.empty, .empty, .empty, .empty, .empty, .branch(b1, b2), .branch(b3, b4)): | |
| return .branch(.branch(.branch(.branch(.branch(.empty, .empty), .branch(b1, b2)), b3), .empty), b4) | |
| case (.empty, .empty, .empty, .empty, .branch(.empty, .empty), .empty, .empty): | |
| return .empty | |
| case let (.empty, .empty, .empty, .empty, .branch(.empty, .empty), .branch(b1, b2), .empty): | |
| return .branch(.branch(.empty, b1), b2) | |
| case let (.empty, .empty, .empty, .empty, .branch(.empty, .branch(b1, b2)), b3, .empty): | |
| return .branch(.branch(.branch(.branch(.empty, b1), b2), .empty),b3) | |
| case let (.empty, .empty, .empty, .empty, .branch(.empty, .empty), b1, .branch(b2, b3)): | |
| return .branch(.branch(.branch(.empty, b1), b2), b3) | |
| case let (.empty, .empty, .empty, .empty, .branch(.empty, .branch(b1, b2)), b3, .branch(b4, b5)): | |
| return .branch(.branch(.branch(.branch(.empty, b1),b2), .branch(b3, b4)),b5) | |
| case let (.empty, .empty, .empty, .empty, .branch(.branch(b1, b2), b3), b4, b5): | |
| return .branch(.branch(.branch(.branch(.branch(.empty, .empty), b1), b2), .branch(b3, b4)),b5) | |
| case let (.empty, .empty, .empty, .branch(b1, b2), b3, b4, b5): | |
| return .branch(.branch(.branch(.branch(.branch(.empty, .branch(.empty, b1)), b2), b3), b4), b5) | |
| case let (.empty, .empty, .branch(b1, b2), b3, b4, b5, b6): | |
| return .branch(.branch(.branch(.branch(.branch(.empty,.branch(.branch(.empty, b1),b2)),b3),b4),b5),b6) | |
| case let (.empty, .branch(b1, b2), b3, b4, b5, b6, b7): | |
| return .branch(.branch(.branch(.branch(.branch(.empty,.branch(.branch(.branch(.empty, b1), b2), b3)), b4), b5), b6), b7) | |
| case let (.branch(.empty, b1), b2, b3, b4, b5, b6, b7): | |
| return .branch(.branch(.branch(.branch(.branch(.branch(b1, b2), b3), b4), b5), b6), b7) | |
| case let (.branch(.branch(b1, b2),b3), b4, b5, b6, b7, b8, b9): | |
| return .branch(.branch(.branch(.branch(.branch(.empty,.branch(.branch(.branch(.branch(b1, b2), b3), b4), b5)), b6), b7), b8), b9) | |
| } | |
| } |
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