Created
November 1, 2011 03:02
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matches.scm
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| (define (matches n) | |
| (run #f (q) | |
| (fresh (a b c d s1 s2) | |
| (domfd a b c d s1 s2 (range 1 n)) | |
| (all-differentfd `(,a ,b ,c ,d)) | |
| (== a 1) | |
| (<=fd a b) (<=fd b c) (<=fd c d) | |
| (plusfd a b s1) (plusfd s1 c s2) (plusfd s2 d n) | |
| (checko `(,a ,b ,c ,d) () () n) | |
| (== q `(,a ,b ,c ,d))))) |
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