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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 |正序浏览

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* S- N0 N3 C0 y\" Z' M9 J
MODEL:. B8 J8 r2 G; A3 R. G
TITLE 宾馆数目;8 W1 d( v3 H5 V0 u C& F
SETS:
\" o+ x$ @! D! h. o! {) f( P
ROOM/1..32/:price,c,double,x1,x2;$ n' E) O; s% ^* r2 m8 J$ m
HOTEL/1..10/:chose;; j/ \& s\" M# D( i4 T/ C
LINKS(HOTEL,ROOM):e;( i! ?1 y/ Z5 F2 }6 H7 D- P. Z( @
!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 v- r u6 H! Q6 H3 Q- G
ENDSETS
; Z/ m1 D5 Z1 ]) s
DATA:
) T1 L6 L& h% d# b6 E0 Z4 ?
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;+ q% _. G% G- h5 ~/ ]. r
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;
- N; G) A6 ?1 p8 U2 ^: z. h/ e2 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;& s% f. E/ S, [
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
( _' o. Z1 H; r
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
2 x& z8 }0 O4 e4 T3 s8 A
0,0,0,0,0,0,0,0,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,01 l. Q, P$ D- E6 ?( ]9 a
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 Z t4 i/ {9 }0 F/ _9 W8 q+ {8 W
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( ?! }\" I+ ^' {\" J+ \
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
: r. i5 K9 a' y# N) C
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 c4 G7 W- `4 r* @' L& C5 r, u
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
: }0 a+ o0 R( F, J U& \
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
8 T, G U8 z1 C. t8 K# A+ G
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;( J: [6 p' K& y. k
ENDDATA' ~4 Y7 J% i7 t- v4 o U
MIN=@SUM(HOTEL:chose);$ O2 U6 j+ u8 b. G6 E\" N
@FOR(LINKS:@BIN(e));( e q% c/ X/ O1 d8 F+ r
@FOR(ROOM:@GIN(x1);@GIN(x2));& a/ U6 ~ L5 f% Q2 @
@FOR(ROOM:c>=x1+x2*double);
( I# D\" F/ W+ b) y& K
@SUM(ROOM|price#GT#120 #and# price#LT#160:x1)>=146;- X6 @$ ]* f; ^+ F/ U+ d
@SUM(ROOM|price#GT#161 #and# price#LT#200:x1)>=85;
! \7 }- Q! Y9 }# v+ I4 X/ W: ?3 v
@SUM(ROOM|price#GT#201 #and# price#LT#300:x1)>=53;
/ L8 E3 a# [ e; l7 ~0 s9 H0 S
@SUM(ROOM|price#GT#120 #and# price#LT#160:x2*double*2)>=203;
5 Y1 _) {( {/ ^ j+ M( y
@SUM(ROOM|price#GT#161 #and# price#LT#200:x2*double*2)>=133;
) C/ W' y7 G! Z9 ~$ M4 m& M& v1 j
@SUM(ROOM|price#GT#201 #and# price#LT#300:x2*double*2)>=43;
+ b7 r4 C$ l+ u) p
@FOR(HOTEL(K):chose=@IF(@SUM(ROOM(I):e(K,I)*(x1(I)+double(I)*x2(I)))#GE#1,1,0));
3 @+ v7 _4 x* d! t$ E7 ?
hotelsum=@SUM(HOTEL:chose);
costall=@SUM(ROOM(i):((x1(i)+x2(i)*double(i))*price(i)));- ?; s& t I4 B- [1 a
END; H) q! u8 V S9 W

复制代码

为什么这个得到的结果反而比这个还差？

# J7 g& H) U6 Q. C) O4 X
MODEL:
/ H* B# g. E# x2 g4 Y\" C
TITLE 宾馆数目;3 g0 k7 b( a6 {. C' I
SETS:
8 a5 N1 m; m\" P. |3 u4 K
ROOM/1..32/:price,c,double,x1,x2;0 P( E\" a! C S t. u) o
HOTEL/1..10/:chose;2 b5 g a- o7 B5 r7 _$ q
LINKS(HOTEL,ROOM):e;) ~/ b- c9 ]0 i* L, V* @ I
!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/;! A/ M' |; H% _8 s
ENDSETS
\" ]8 f+ U; C6 y e7 d: F
DATA:$ e+ F, [% O4 V1 E5 L; s. q4 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;, J2 e& d( f# ~/ B' W8 `
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;3 A$ O' E. z( ?( ?% b! _
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;( E# Z1 d' m1 X. m7 `( l8 `
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
- P4 h: a, u1 @! 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 u- ]$ K/ }7 {% y6 T% _: a/ X# d o
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
/ f3 P% e/ Z9 j; v# w; ~: `
0,0,0,0,0,0,0,0,0,0,0,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
: ]! e! Y4 i' Y- O8 }9 t
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
* R2 P! U% S% a2 e2 a
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
. l5 |\" x; m/ r* y7 d1 ^1 b! 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
5 l. Z6 ]. B) _8 i/ g* g0 z5 Y
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! e8 `; z5 S( C' W! ]; m* s* 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
9 k9 |7 x7 K' Q
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;
9 @/ r: x. {# |1 ?. U7 v2 K
ENDDATA, n4 H9 o3 N( w9 S
MIN=@SUM(ROOM(i):((x1(i)+x2(i)*double(i))*price(i)));
4 F; w1 D6 N, V: t% u
@FOR(LINKS:@BIN(e));
' j+ v) I+ |5 h5 l/ J3 m2 C# \. g
@FOR(ROOM:@GIN(x1);@GIN(x2));
0 q: @4 |! c8 V9 H5 s
@FOR(ROOM:c>=x1+x2*double);
- o) D5 Q _1 D0 Z0 m2 W6 v
@SUM(ROOM|price#GT#120 #and# price#LT#160:x1)>=146;: q v# a\" [* E. V4 i
@SUM(ROOM|price#GT#161 #and# price#LT#200:x1)>=85;
$ o) B/ V; X& i! z$ y6 i
@SUM(ROOM|price#GT#201 #and# price#LT#300:x1)>=53;. B) z5 k' H. `1 q0 P: n
@SUM(ROOM|price#GT#120 #and# price#LT#160:x2*double*2)>=203;
- ?$ Z8 |9 e2 V- H# q, S7 p6 V
@SUM(ROOM|price#GT#161 #and# price#LT#200:x2*double*2)>=133;
0 ]. w H. i9 O; S' h8 m6 b( \$ A
@SUM(ROOM|price#GT#201 #and# price#LT#300:x2*double*2)>=43;
9 _\" A I: {7 f: q5 c# B
@FOR(HOTEL(K):chose=@IF(@SUM(ROOM(I):e(K,I)*(x1(I)+double(I)*x2(I)))#GE#1,1,0)); h\" _: Y4 ^( V. X. ]( b
hotelsum=@SUM(HOTEL:chose);
: t* F( Q9 N+ I0 ^& u4 P D2 }
costall=@SUM(ROOM(i):((x1(i)+x2(i)*double(i))*price(i)));
6 n\" p3 r; ^% F! Z: F
END1 c9 E0 C* ~+ ^4 H