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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:
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TITLE 宾馆数目;# E$ t( C( i; {2 @; M2 f
SETS:
\" B$ Z$ x! f0 F: o
ROOM/1..32/:price,c,double,x1,x2;
# i3 f8 P( V; U2 P7 @4 H8 |
HOTEL/1..10/:chose;5 R1 h2 D; \% f! c9 _
LINKS(HOTEL,ROOM):e;1 c* b% x+ ]\" l B4 t& i. A
!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/;
# j0 C9 Z& z! K G: K: x7 ?
ENDSETS: z H. ?3 f) _\" n0 @; g- }
DATA:1 ^6 W1 s# I/ l K
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;
$ T9 Z. j/ e: {6 z9 Z( p
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;
* }/ k! ?% U8 t- N8 I\" P/ H% k+ |
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;\" F; v6 D: w; |- H* C
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
8 x! J- k, r: h2 O `8 B
0,0,0,0,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,03 A- g; G( N+ Q* _9 H3 v! Q
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 x/ l2 m\" b0 x9 C, t
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
, A; @& h0 T7 N! ~+ K* ]6 o
0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,04 o& F, S# Q f) q$ r# D\" v' {5 x
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* u: B4 f! h& J0 J
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* j7 Z2 J& p b) C) \9 a3 V
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 H- u' z3 c0 I
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
3 \& R9 `1 s& J( ]* L! B! Y
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;5 y6 y+ b2 e7 ]8 w
ENDDATA& K# B% g t' D\" f x
MIN=@SUM(HOTEL:chose);
. Y) O) y: H& t$ p; ]- m! u3 ^5 l) ~# M
@FOR(LINKS:@BIN(e));, Z, }9 C! q. P, F
@FOR(ROOM:@GIN(x1);@GIN(x2));
% [ x1 A* u& D5 I2 v( {/ p
@FOR(ROOM:c>=x1+x2*double);+ }/ E! ~* M+ }$ w7 f. D
@SUM(ROOM|price#GT#120 #and# price#LT#160:x1)>=146;
, R! i% `\" n/ X3 g+ P/ D6 e
@SUM(ROOM|price#GT#161 #and# price#LT#200:x1)>=85;
' ~- Y# W$ O) }9 r
@SUM(ROOM|price#GT#201 #and# price#LT#300:x1)>=53;
R, W+ f9 P+ Q$ @* d6 U\" Y
@SUM(ROOM|price#GT#120 #and# price#LT#160:x2*double*2)>=203;
, D- z$ N\" I5 \\" p' n) S
@SUM(ROOM|price#GT#161 #and# price#LT#200:x2*double*2)>=133;
: c\" f8 k1 ~' L4 X) f
@SUM(ROOM|price#GT#201 #and# price#LT#300:x2*double*2)>=43;( Z* g' l1 V( i1 C) E/ p. l6 F. S
@FOR(HOTEL(K):chose=@IF(@SUM(ROOM(I):e(K,I)*(x1(I)+double(I)*x2(I)))#GE#1,1,0));& ^: Q* [7 s/ `! ~& l5 H2 H4 U
hotelsum=@SUM(HOTEL:chose);6 x) k5 {$ j9 Q) I1 ]( v
costall=@SUM(ROOM(i):((x1(i)+x2(i)*double(i))*price(i)));
END' m. `8 |, w& _

复制代码

为什么这个得到的结果反而比这个还差？

! G# ]. e: C\" t/ r! v+ f4 @( J
MODEL: W# D) {\" x8 N
TITLE 宾馆数目;
# Z+ R3 R( e$ W
SETS:. E& \5 \& Q5 Q$ ^: W2 C
ROOM/1..32/:price,c,double,x1,x2;# i9 L, \8 L( d5 s4 O' ? h. d9 }. t
HOTEL/1..10/:chose;
8 z. r; s) J' ?. Z; {
LINKS(HOTEL,ROOM):e;
\" Y3 x3 Z0 o) q% L8 ]4 ^$ 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/;8 O6 y: P2 c6 {* M Z6 ^
ENDSETS
; k' q9 c6 c* [ o* K
DATA:
: ]: |9 H# Z5 u$ B- a
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;
3 A7 W( f! N& O$ |( m! B
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;
8 s2 y# L/ i' t# u ~; ^
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;
2 L. s2 X( m8 n5 q# r0 N2 w- k
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
0 n, X( J3 U; x3 E$ t0 U
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 u9 O$ O) g y5 C6 D7 \$ r
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 y6 L' v$ s8 ]( _ F
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: ^6 s# _# ]! E9 n c: O
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
; D% A1 ?% l, n- C' |; Z% _
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, e( o( t; y; u9 Y3 |; _3 H- ~
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
1 Z1 K Y( v0 s
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
1 N3 [( _' r; J7 d
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,0,0( p; K& I M: J! \' K
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* Z; ^8 k8 g9 k/ @6 ?
ENDDATA
\" Q8 [% U9 H! Z2 E& g8 e/ ^+ D\" q
MIN=@SUM(ROOM(i):((x1(i)+x2(i)*double(i))*price(i)));+ L0 e7 G5 A8 x) T& Y/ e% l
@FOR(LINKS:@BIN(e));4 R1 X' t8 ]4 T7 S6 i
@FOR(ROOM:@GIN(x1);@GIN(x2)); z/ X7 u% b! d, {' g
@FOR(ROOM:c>=x1+x2*double);+ W+ j! q, h\" E+ T2 E/ u$ J
@SUM(ROOM|price#GT#120 #and# price#LT#160:x1)>=146;2 }2 t* ~1 E3 [
@SUM(ROOM|price#GT#161 #and# price#LT#200:x1)>=85;
; Q: |# q6 h* V! S3 k
@SUM(ROOM|price#GT#201 #and# price#LT#300:x1)>=53;7 R* W% O! Y# {7 r0 @, `
@SUM(ROOM|price#GT#120 #and# price#LT#160:x2*double*2)>=203;
\" Z6 E9 F\" N1 N P
@SUM(ROOM|price#GT#161 #and# price#LT#200:x2*double*2)>=133;5 S$ P) R8 G; n$ d# H1 Y
@SUM(ROOM|price#GT#201 #and# price#LT#300:x2*double*2)>=43;
& ~9 o7 ]4 V& o. ^1 V& T\" N, u
@FOR(HOTEL(K):chose=@IF(@SUM(ROOM(I):e(K,I)*(x1(I)+double(I)*x2(I)))#GE#1,1,0));
0 `2 X& B5 H/ S
hotelsum=@SUM(HOTEL:chose);' |! N2 C+ L$ Z3 y
costall=@SUM(ROOM(i):((x1(i)+x2(i)*double(i))*price(i)));1 S) |! H/ Z$ h- m/ @( }& F4 A# g\" S
END
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