verilog, 220 bytes

Result

WA

Duration

469ms

Code [DL]

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

stdin

35 33 24
84 05 20
34 99 05
79 07 34

stdout

stderr

/volume/CODE:1: syntax error
/volume/CODE:1: error: Invalid module instantiation
/bin/script: line 14: /tmp/code: not found
rm: can't remove '/tmp/code': No such file or directory

strace