by@kcz146
WA
465ms
a=(`cat`) for((;z<9;)){ $[a[t=z]-=a[9+t%3],s+=t/6*a[z++]*(a[p=++t%3+3]*a[++t%3]-a[t+3]*a[p-3])/6] } echo $s
07 37 06 76 60 32 08 85 55 84 06 40
0
/volume/CODE: line 3: 0: command not found /volume/CODE: line 3: 08: value too great for base (error token is "08")