max 18 P + 23 G + 17 H - 10 b1 -20b2 - 55 b3 - 5 x1 -4 x2 - 3 x3
st labor) 10 P + 30 G + 20 H < 14400
metal) 4 P + G + 6 H - AM < 2800
budg) 600 SP + 900 SG + 700 SH + 2 AM < 2000
P -950 SP < 0
G -480 SG < 0
H -634 SH < 0
min_bat) 200 SG - G < 0
x1 - 10 b1 < 0
x2 - 35 b2 < 0
x3 - 950 b3 < 0
b1 + b2 + b3 < 1
x1 + x2 + x3 - P > 0 
end
int SP
int SG
int SH
int b1
int b2
int b3
gin P
gin G
gin H
leave
