装箱问题的FFD近似..先按从大到小排列 S=(0.8 ,0.5 ,0.4 ,0.4 ,0.3 ,0.2 ,0.2 ,0.2)FFD求的话:第一个箱子装(0.8 ,0.2)第二个: (0.5 ,0.4)第三个:(0.4, 0