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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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7 l2 a1 ]5 l+ H# R2 c; ~
MODEL:
! D* Y( h4 C% [8 K
TITLE 宾馆数目;
* J' g* g9 S0 `' }+ Y0 G
SETS:
* c3 g- ?; h* T1 b3 m( @
ROOM/1..32/:price,c,double,x1,x2;
Z/ Z/ L+ F\" g2 A' a6 J3 k: m
HOTEL/1..10/:chose;
- v' M5 n7 [: p. P, U
LINKS(HOTEL,ROOM):e;
) \% a- o' v: S( C\" n: b {% [7 K' [
!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/;
' q3 i2 }7 \' O. [/ g% {& v3 O
ENDSETS' |2 o) o/ t% w U) H
DATA:8 L' b\" `5 \% N4 |
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;
7 z1 m3 O. b, Z
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;
+ M; D- Q+ |; G& J$ S
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;: Z3 A+ N, h) q\" b
e=1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,00 Q3 y L& p+ x. D0 [
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
* ~# ?+ t3 i5 T/ @+ T
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
! o\" e! T, p( ~7 p% |& X& m( B
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
* O1 }6 G\" a& N/ @\" j4 H$ n, f3 B
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 O9 g+ E) K' {3 j9 s& F2 p
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
' q H$ K# D) T: M
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
& |3 z% K& J' J! Z
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 [) b; ?/ f! H# l- y' q% j4 z
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$ y) v4 c% V( Z. c
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;
. D* b2 M6 d' Z$ U2 ?
ENDDATA! W9 j8 Y7 E. f\" y4 j' Y U( D
MIN=@SUM(HOTEL:chose);\" E8 V\" \6 |. V, v- d/ I
@FOR(LINKS:@BIN(e));
- }7 d8 y, o9 D
@FOR(ROOM:@GIN(x1);@GIN(x2));
4 n! v/ B2 B\" P f\" a+ d
@FOR(ROOM:c>=x1+x2*double);
( U, b( f- f7 @# ~
@SUM(ROOM|price#GT#120 #and# price#LT#160:x1)>=146;; [& X. q% o\" x @+ J( }$ g* Q\" N
@SUM(ROOM|price#GT#161 #and# price#LT#200:x1)>=85;
$ L6 F- ?: I/ [. |& c
@SUM(ROOM|price#GT#201 #and# price#LT#300:x1)>=53;
* e/ j) B2 m* i* Z& |; g
@SUM(ROOM|price#GT#120 #and# price#LT#160:x2*double*2)>=203;- ~8 \\" V) V- y' }7 X& R- c5 r9 N
@SUM(ROOM|price#GT#161 #and# price#LT#200:x2*double*2)>=133;
+ o& ?/ [) K$ `% j# v7 D* |% e
@SUM(ROOM|price#GT#201 #and# price#LT#300:x2*double*2)>=43;2 N0 W/ B3 y9 N+ v0 Z5 e
@FOR(HOTEL(K):chose=@IF(@SUM(ROOM(I):e(K,I)*(x1(I)+double(I)*x2(I)))#GE#1,1,0));
4 ?/ S+ Y( t8 N8 t: g
hotelsum=@SUM(HOTEL:chose);
+ r/ F# s9 R* ]+ e3 R6 I\" f! C- ^
costall=@SUM(ROOM(i):((x1(i)+x2(i)*double(i))*price(i)));
( U$ w3 B0 b% r% k% ^
END, G. G: K. y) v& D! e# m# F3 a

复制代码

为什么这个得到的结果反而比这个还差？

, ~2 n: U; Z# Z7 O* T8 N2 h
MODEL:4 ?8 `+ g2 `\" ~
TITLE 宾馆数目;
/ [' D- R A( u3 B7 P1 F
SETS:1 N/ C9 o2 k& ?. E; u; `
ROOM/1..32/:price,c,double,x1,x2;
7 b( \& D# s; m5 V
HOTEL/1..10/:chose;$ k! X& b! x1 B W7 }+ e* t M
LINKS(HOTEL,ROOM):e;
. m2 j6 R) F2 a6 P\" |0 X0 @2 f! J
!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/;& X) C, Y: ]# w+ b
ENDSETS
/ |1 u+ \2 [* X3 Q5 `
DATA:4 w7 d7 [( n/ ?
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;
! I1 J, {/ F5 g5 S. f- \' n; m
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. u+ x: {6 @5 O- 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;. @+ V6 {% G l% k7 b3 o
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: ?4 M; \; F2 F- k0 {3 w
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
3 g3 j$ y9 |8 @% V# I* t# ?
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
; n c+ t5 u8 R! H; u( v$ 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, z A$ ] x# P; X# I( q
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
. M1 p\" Q9 [! \/ ~, Y, u- S) c
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
$ a: |. v2 m( o' I, ~% Q5 N
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,0,0,0,0,0,0,0,0,02 A3 D% ?. F+ |+ t, u z
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
: w% k6 O4 r/ Z# S5 @9 _2 ~0 H
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,0,0
* x* g% f% _' I9 A% n* i
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1;
\" S& v& L/ L' m4 b! @\" j. |4 w) _
ENDDATA
* c# g- r( ~6 p; m
MIN=@SUM(ROOM(i):((x1(i)+x2(i)*double(i))*price(i)));$ D\" X# ?6 }1 b4 e7 p\" O
@FOR(LINKS:@BIN(e));! l/ Z6 H% g9 d4 Z\" j! k; ?% ~
@FOR(ROOM:@GIN(x1);@GIN(x2));% k k, g7 w9 o4 K
@FOR(ROOM:c>=x1+x2*double);3 l7 m* ~+ x0 T% F
@SUM(ROOM|price#GT#120 #and# price#LT#160:x1)>=146;3 P; b9 p3 X! m\" y2 Q+ l2 u* U
@SUM(ROOM|price#GT#161 #and# price#LT#200:x1)>=85;
0 e7 H8 K J5 e* O
@SUM(ROOM|price#GT#201 #and# price#LT#300:x1)>=53;, ]6 _) |; u0 ?
@SUM(ROOM|price#GT#120 #and# price#LT#160:x2*double*2)>=203;
/ j! O+ K7 e+ N7 i0 ]0 V5 [, o$ `
@SUM(ROOM|price#GT#161 #and# price#LT#200:x2*double*2)>=133;: q8 i: h) z/ ^9 A6 ^( ]
@SUM(ROOM|price#GT#201 #and# price#LT#300:x2*double*2)>=43;
2 y; _ `& P2 a# {5 s
@FOR(HOTEL(K):chose=@IF(@SUM(ROOM(I):e(K,I)*(x1(I)+double(I)*x2(I)))#GE#1,1,0));
( f$ O- o; I/ t6 ]$ W9 E
hotelsum=@SUM(HOTEL:chose);: M2 R; h) B\" g3 u1 B
costall=@SUM(ROOM(i):((x1(i)+x2(i)*double(i))*price(i)));
6 e. `7 X8 s) K# b5 N* P2 W5 x
END* O0 R' F3 w\" S$ ` V3 {) A