by@kcz146
WA
497ms
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
23 22 99 58 46 69 09 70 81 79 85 70
0
/volume/CODE: line 3: 0: command not found /volume/CODE: line 3: 09: value too great for base (error token is "09")