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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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5 A. [( V+ M/ [! b2 w m+ ~/ t8 p
MODEL:8 l) q! O/ i; T! z6 u7 |6 B' a ~
TITLE 宾馆数目;: w4 P! j& R3 r& X; b$ ]+ }6 `0 P: u
SETS:
ROOM/1..32/:price,c,double,x1,x2;- k$ d3 u' c7 _+ X- a* a; s4 W
HOTEL/1..10/:chose;! c7 G1 D3 m! E\" ]
LINKS(HOTEL,ROOM):e;. y- n5 v g5 x1 c$ |
!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/;# J g: x2 {8 V0 W7 i\" S' t0 H8 Z/ _7 h; V
ENDSETS+ N% e0 R\" R/ k* b& f1 o\" k7 X$ N
DATA:
# D* G3 ]' D7 k, r0 O\" c9 D- ?! N7 u
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;
$ T) @' _3 W: t! k Q
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;( K6 _. F/ @9 j1 g4 s1 H
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;6 i# |: {\" h& A& w4 j) C. X
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: _5 f9 Y( k2 I& t# K\" F
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
! K0 R* G. G, 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
9 [% b$ _8 V- H
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 w! x6 ?6 V1 u9 L
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
9 O* M; Q X/ }7 ~/ W4 ^
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' M2 s, X8 R, f/ ]\" Q% _: Q# ]3 z4 g
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
6 O6 k5 j; V; r. Z$ o0 T$ ?0 _
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,0,0,0,0,0,05 L, M; V% v) S/ S# L
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
4 n! Q% _# _% {; h
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;
' N% A& X( r/ O
ENDDATA( F; U. h( ?3 T( U
MIN=@SUM(HOTEL:chose);
: E# K( U5 i; e! Q
@FOR(LINKS:@BIN(e));; t; x; a: x6 |5 P/ R$ H% ~
@FOR(ROOM:@GIN(x1);@GIN(x2));
' N$ o6 |0 U\" [. Q* X' P\" u' o
@FOR(ROOM:c>=x1+x2*double);+ c/ u) Q0 P q6 I6 O7 ^& o6 W0 i) [
@SUM(ROOM|price#GT#120 #and# price#LT#160:x1)>=146;& A) q% u& ]5 n. E! F* o
@SUM(ROOM|price#GT#161 #and# price#LT#200:x1)>=85;
( i p1 v# l/ Z5 S* A! a8 Q# I& ^8 L
@SUM(ROOM|price#GT#201 #and# price#LT#300:x1)>=53;. V9 r- n# M* b9 |- X
@SUM(ROOM|price#GT#120 #and# price#LT#160:x2*double*2)>=203;
/ W% R5 `/ D3 q* ?\" y
@SUM(ROOM|price#GT#161 #and# price#LT#200:x2*double*2)>=133;' _. b, n1 r. S# }
@SUM(ROOM|price#GT#201 #and# price#LT#300:x2*double*2)>=43;% N- P6 K8 I& e\" w
@FOR(HOTEL(K):chose=@IF(@SUM(ROOM(I):e(K,I)*(x1(I)+double(I)*x2(I)))#GE#1,1,0));: ^. {. \3 W v( F, o* Q
hotelsum=@SUM(HOTEL:chose);3 k9 a! K) v) \
costall=@SUM(ROOM(i):((x1(i)+x2(i)*double(i))*price(i)));
+ F! H( ^8 X( U
END- U5 n$ R3 O, g2 o# b: e4 _+ t

复制代码

为什么这个得到的结果反而比这个还差？

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MODEL:
& ?6 f, I& C0 H) x% p& @
TITLE 宾馆数目;6 `\" o5 K# g$ ?4 ?4 w\" E/ v
SETS:
. [9 `0 J: Z* w
ROOM/1..32/:price,c,double,x1,x2;- c4 [, h K* W
HOTEL/1..10/:chose;1 K6 G6 O: ?% h\" r4 \. Y. d
LINKS(HOTEL,ROOM):e;
\" V* |$ ~; I+ O8 L# }0 S4 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/;7 T# {; ^6 V4 `$ s9 F
ENDSETS
9 \, o* ]3 z- x9 j! u- y8 ~+ j' L
DATA:7 W; i0 X' t0 v1 I% J2 E
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;6 K# e0 i6 C7 U2 S0 Y* N' Y) Q
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;! X: G% @! ~# j7 `6 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;\" T0 ]( G% g6 m# c% 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, [ c5 ^5 s8 D
0,0,0,0,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,05 W5 Q/ [; l9 W; e+ m
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
3 X) `' S( d7 \6 g
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# c& y- M' L\" T! J! U# m
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
% f! G, _1 U+ F7 I1 [% o, s 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) c h& b\" }7 y/ W3 x
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
2 A: a: |- e% z( t7 W$ Q' `
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\" T. C5 }1 W3 a! g/ ]
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,0,0# g ^, P8 ~9 m; ]) E: A
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;
2 o; I9 ?$ h% f\" z! {* w4 t; d5 s
ENDDATA3 z8 Y, X1 r/ l1 j9 q
MIN=@SUM(ROOM(i):((x1(i)+x2(i)*double(i))*price(i)));
! T+ _' j* u2 y0 [
@FOR(LINKS:@BIN(e));- ^8 x/ o$ ~9 c\" P9 K
@FOR(ROOM:@GIN(x1);@GIN(x2)); {* ]/ K6 U: P
@FOR(ROOM:c>=x1+x2*double);7 L4 a# r' N+ i3 I' C4 K3 E
@SUM(ROOM|price#GT#120 #and# price#LT#160:x1)>=146; X& [$ q1 F$ C
@SUM(ROOM|price#GT#161 #and# price#LT#200:x1)>=85;) g' h0 y0 S0 m! o* W
@SUM(ROOM|price#GT#201 #and# price#LT#300:x1)>=53; p3 D4 n; o# V. _, c
@SUM(ROOM|price#GT#120 #and# price#LT#160:x2*double*2)>=203;
1 j3 l. ^, `: ^8 ?\" J
@SUM(ROOM|price#GT#161 #and# price#LT#200:x2*double*2)>=133;# I1 ]) [; W. Z9 y! A\" \% s
@SUM(ROOM|price#GT#201 #and# price#LT#300:x2*double*2)>=43;2 ~: t' f0 ^. A% O
@FOR(HOTEL(K):chose=@IF(@SUM(ROOM(I):e(K,I)*(x1(I)+double(I)*x2(I)))#GE#1,1,0));* g( d3 i; ^1 q' d1 O
hotelsum=@SUM(HOTEL:chose);2 n l9 e! |0 I% ] O
costall=@SUM(ROOM(i):((x1(i)+x2(i)*double(i))*price(i)));( ?% o$ \# Y. R* {
END( G7 W& y3 a/ x& X) s) B% d