by@kcz146
WA
504ms
a=(`cat`)
for z in {0..8};{
$[a[t=z]-=a[9+z%3],s+=z/6*a[z]*(a[++t%3+3]*a[q=++t%3]-a[q+3]*a[z%3])/6]
}
echo $s79 69 93 98 66 25 31 35 07 32 59 83
5605
/volume/CODE: line 3: 0: command not found /volume/CODE: line 3: 0: command not found /volume/CODE: line 3: 0: command not found /volume/CODE: line 3: 0: command not found /volume/CODE: line 3: 0: command not found /volume/CODE: line 3: 0: command not found /volume/CODE: line 3: -466: command not found /volume/CODE: line 3: 13078: command not found /volume/CODE: line 3: 5605: command not found