4X4的一些解决方案
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..4..5..1..4....3..0..6..6....4..0..0..0....0..0..0..0....0..0..1..4
..1..4..5..1....3..3..0..6....1..4..0..0....0..0..0..0....0..0..0..1
..5..1..4..5....0..3..3..0....1..1..4..0....0..0..0..4....0..0..0..0
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