verilog, 225 bytes

Result

WA

Duration

494ms

Code [DL]

module z;time a,b,c,d,e,f,g,h,i,j,k,l;initial begin $fscanf(1<<31,"%d%d%d%d%d%d%d%d%d%d%d%d",a,b,c,d,e,f,g,h,i,j,k,l);d-=a;e-=b;f-=c;g-=a;h-=b;i-=c;j-=a;k-=b;l-=c;$write((g*k*f+j*e*i+d*h*l-j*h*f-d*k*i-g*e*l)/6);end endmodule

stdin

35 46 89
20 82 26
74 03 05
01 88 65

stdout

/tmp/code: Program not runnable, 1 errors.

stderr

/volume/CODE:1: Error: $fscanf() is a system function, it cannot be called as a task.

strace