$\sqrt{\Box}$ 4/5/4
20, 20, 3, 42, 29, 36, 14, 31, 26, 36, 32, 30, 30, 24, 23, 23, 18, 17
4/5/4
()
4/5:4
0.8x+1.5y+2.5z=1.21
0x+0.4y+0.8z=0.21353
x+y+z=52
(850-2.5x)/(425-x)< 0.8
L+1/L=
(850-2.5x)/(425-x)<0.8
26, 23, 24, 29, 20, 24, 34, 10, 20, 28, 27, 24, 24, 24, 23, 20, 19, 13
