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 $s73 28 44 77 61 01 74 80 22 93 87 57
1731
/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: 1358: command not found /volume/CODE: line 3: 355: command not found /volume/CODE: line 3: 1731: command not found