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[问题求助] 请教下大侠们lingo最优解的问题

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不支持自定义 Discuz! 代码

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发表于 2010-1-10 14:45 |只看该作者 |倒序浏览

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MODEL:' x7 A' D4 g+ u
TITLE 宾馆数目;0 D) D$ S9 K4 E1 s8 t- x1 L2 W
SETS:! P% i7 r! z( L9 C
ROOM/1..32/:price,c,double,x1,x2;
( E% o+ v; {\" }; j) o0 {- |& D/ S
HOTEL/1..10/:chose;( B8 t) @/ [; R) A
LINKS(HOTEL,ROOM):e;+ b$ e, _1 g4 Z\" t! \
!HOTEL(ROOM,ROOM)/1,2,3,4 5,6,7,8 9,10,11 12,13 14,15,16 17,18,19,20 21,22,23 24,25,26 27,28,29,30 31,32/;
4 O# A/ N( e' D$ H: N/ z+ C
ENDSETS
) s% @' l1 b U- m' {# r S
DATA:. l3 r, i& Q% [: `\" s% K6 {
price=180 220 180 220 140 160 180 200 150 180 150 140 200 140 160 200 160 170 180 220 150 160 300 180 160 180 260 260 280 280 260 280;+ R- {5 N) I# z8 q' w% X
c=50 30 30 20 50 35 30 35 50 24 27 50 45 35 35 40 40 40 30 30 50 40 30 40 40 45 30 30 30 30 55 45;
* B: U& o* O# ?% v! P f& i7 E
double=1,1,0,0,1,1,1,1,1,1,0,1,1,1,1,1,0,1,0,1,1,0,0,1,1,0,1,0,1,0,1,1;
: i5 ]3 q* m7 P7 E# y' G$ a. u
e=1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0$ X% {. s- p6 e7 D& `) \) p
0,0,0,0,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
# |8 O0 _9 _; b/ T- x
0,0,0,0,0,0,0,0,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
5 ]0 ~* b9 S0 w
0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,07 ?/ [# ^5 r0 H# m) n
0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0) o5 {' A; V( a4 f( o0 S
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0% K2 G, d7 t; u9 t1 Z; f( f
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,0,0,0,0,0,0,0,0,0! i5 j\" Z/ v0 g7 Q1 J
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,0,0,0,0,0,0) I3 a9 Q+ a7 H0 Y9 q' R+ B
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,0,0/ i o- N$ K2 I% v% o6 D
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1;
! Z* c! c9 g3 m) }
ENDDATA
2 m( b) P& ^( t5 X+ ^+ l
MIN=@SUM(HOTEL:chose);
% Q% @/ y0 @- E$ d7 e' ~ W9 R
@FOR(LINKS:@BIN(e)); I! j O- o7 r6 q* o
@FOR(ROOM:@GIN(x1);@GIN(x2));
* W0 Z7 u0 |8 N* Q6 [, {9 H
@FOR(ROOM:c>=x1+x2*double);# J& X, N: ]0 l9 S/ T$ @5 L) e i5 k
@SUM(ROOM|price#GT#120 #and# price#LT#160:x1)>=146;8 R5 `\" i4 m; e( `$ z8 a
@SUM(ROOM|price#GT#161 #and# price#LT#200:x1)>=85;8 W$ {6 C9 p5 X% b% n' ]
@SUM(ROOM|price#GT#201 #and# price#LT#300:x1)>=53;6 D# ]5 T6 f, E1 O) ^8 s& P
@SUM(ROOM|price#GT#120 #and# price#LT#160:x2*double*2)>=203;- O' p1 V% \. y6 q- R
@SUM(ROOM|price#GT#161 #and# price#LT#200:x2*double*2)>=133;) r: a v( v4 x1 u( _/ X\" U
@SUM(ROOM|price#GT#201 #and# price#LT#300:x2*double*2)>=43;2 l, I) f$ s6 k0 M7 ~8 _ u! G
@FOR(HOTEL(K):chose=@IF(@SUM(ROOM(I):e(K,I)*(x1(I)+double(I)*x2(I)))#GE#1,1,0));. [& c# u* F0 Z- Q8 W
hotelsum=@SUM(HOTEL:chose);
' G$ h9 y6 A0 s0 o
costall=@SUM(ROOM(i):((x1(i)+x2(i)*double(i))*price(i)));) B- q# Z. |% y. ~, E ^4 a: N
END6 G' s5 C( | y9 ~ D0 {

复制代码

为什么这个得到的结果反而比这个还差？

( w+ ]1 C! Z; P D' K( i
MODEL:0 n4 l8 d7 R* E5 t p5 u3 Y
TITLE 宾馆数目;
& Q V+ L2 B( C4 o
SETS:
5 G7 N( [8 V0 V% ]; ?
ROOM/1..32/:price,c,double,x1,x2;
\" o4 h0 O/ v8 S1 Q
HOTEL/1..10/:chose;
; T6 \* i# d8 \1 c# `- t, Y, E. f
LINKS(HOTEL,ROOM):e;! ]/ M# V$ ?* D
!HOTEL(ROOM,ROOM)/1,2,3,4 5,6,7,8 9,10,11 12,13 14,15,16 17,18,19,20 21,22,23 24,25,26 27,28,29,30 31,32/;
% O2 w, y0 Q/ l3 a H% z3 b
ENDSETS
5 o\" M6 |, e+ v. z
DATA:
' L( _& _; A# M: L% F; S\" D\" }# j
price=180 220 180 220 140 160 180 200 150 180 150 140 200 140 160 200 160 170 180 220 150 160 300 180 160 180 260 260 280 280 260 280;
0 V* d7 }! c* N( Q* Q; [, t$ I
c=50 30 30 20 50 35 30 35 50 24 27 50 45 35 35 40 40 40 30 30 50 40 30 40 40 45 30 30 30 30 55 45;
6 c( C/ @' X2 ?5 O1 f
double=1,1,0,0,1,1,1,1,1,1,0,1,1,1,1,1,0,1,0,1,1,0,0,1,1,0,1,0,1,0,1,1;* ~- P( ?1 Q! x7 r: V
e=1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0* \: D% \! n6 _( u, p, v) S
0,0,0,0,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
: ~7 [- o+ W9 a\" c- t' I- K
0,0,0,0,0,0,0,0,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,06 F# c q7 l; c
0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0' J6 T% q0 U k; w# Y
0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
- c6 I! T3 b- e; |- K, g
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0/ D1 L7 @7 z' g3 j: O
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,0,0,0,0,0,0,0,0,0
' n' h. [# G. [, `1 E1 v8 }
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,0,0,0,0,0,0
5 c' B) p( s( V$ x e' { T
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,0,0\" y0 Q! T- @3 ?3 X
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1;( t/ ]7 X* l( k4 w* g* C
ENDDATA
\" \% e8 X! E; t, O8 x T
MIN=@SUM(ROOM(i):((x1(i)+x2(i)*double(i))*price(i)));
0 J, N5 ^; }/ s8 s
@FOR(LINKS:@BIN(e));4 l1 u) T- N6 b7 Z# d, K' ]$ c9 j, a
@FOR(ROOM:@GIN(x1);@GIN(x2));' W\" O, W- _! U: v# I5 u7 U. T. Z$ E7 R
@FOR(ROOM:c>=x1+x2*double);
4 z; o( |# [3 h
@SUM(ROOM|price#GT#120 #and# price#LT#160:x1)>=146;
6 B( X9 d# p6 n; h% w2 o
@SUM(ROOM|price#GT#161 #and# price#LT#200:x1)>=85;! i1 v- p6 U$ |5 L* V
@SUM(ROOM|price#GT#201 #and# price#LT#300:x1)>=53;
. l2 F$ s' }7 \& P* k
@SUM(ROOM|price#GT#120 #and# price#LT#160:x2*double*2)>=203;
1 e' M: x* O! s- v6 x* d
@SUM(ROOM|price#GT#161 #and# price#LT#200:x2*double*2)>=133;: F2 W+ c; ], P+ k8 r! M E8 L4 ~
@SUM(ROOM|price#GT#201 #and# price#LT#300:x2*double*2)>=43;
- P6 K' `! `6 l0 ~ m
@FOR(HOTEL(K):chose=@IF(@SUM(ROOM(I):e(K,I)*(x1(I)+double(I)*x2(I)))#GE#1,1,0));9 O$ A3 r$ @\" v; n: Z' o, `
hotelsum=@SUM(HOTEL:chose);6 L# T+ t W$ T; j/ [
costall=@SUM(ROOM(i):((x1(i)+x2(i)*double(i))*price(i)));
0 f$ t- S& }( }: n0 @
END+ E\" N2 @1 x* N# d