You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
|
|
|
|
#lang br
|
|
|
|
|
(require "aima.rkt")
|
|
|
|
|
|
|
|
|
|
; SEND
|
|
|
|
|
;+ MORE
|
|
|
|
|
;------
|
|
|
|
|
; MONEY
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
(define (word-value . xs)
|
|
|
|
|
(for/sum ([(x idx) (in-indexed (reverse xs))])
|
|
|
|
|
(* x (expt 10 idx))))
|
|
|
|
|
|
|
|
|
|
(define vs '(s e n d m o r y))
|
|
|
|
|
(define vds (for/list ([k vs])
|
|
|
|
|
($vd k (range 10))))
|
|
|
|
|
|
|
|
|
|
(define (not= x y) (not (= x y)))
|
|
|
|
|
|
|
|
|
|
(define alldiffs
|
|
|
|
|
(for/list ([pr (in-combinations vs 2)])
|
|
|
|
|
($constraint pr not=)))
|
|
|
|
|
|
|
|
|
|
(define smm (make-csp vds (append
|
|
|
|
|
alldiffs
|
|
|
|
|
(list
|
|
|
|
|
($constraint '(s) positive?)
|
|
|
|
|
($constraint '(m) positive?)
|
|
|
|
|
($constraint '(d e y) (λ (d e y) (= (modulo (+ d e) 10) y)))
|
|
|
|
|
($constraint '(n d r e y) (λ (n d r e y)
|
|
|
|
|
(= (modulo (+ (word-value n d) (word-value r e)) 100)
|
|
|
|
|
(word-value e y))))
|
|
|
|
|
($constraint '(e n d o r y) (λ (e n d o r y)
|
|
|
|
|
(= (modulo (+ (word-value e n d) (word-value o r e)) 1000) (word-value n e y))))
|
|
|
|
|
($constraint '(s e n d m o r y) (λ (s e n d m o r y)
|
|
|
|
|
(= (+ (word-value s e n d) (word-value m o r e))
|
|
|
|
|
(word-value m o n e y))))))))
|
|
|
|
|
|
|
|
|
|
(parameterize ([current-select-variable mrv]
|
|
|
|
|
[current-order-values lcv]
|
|
|
|
|
[current-inference mac])
|
|
|
|
|
(time (solve smm)))
|
|
|
|
|
(nassigns smm)
|
|
|
|
|
(nchecks smm)
|
|
|
|
|
(reset! smm)
|
