verilog, 230 bytes

Result

WA

Duration

491ms

Code [DL]

module z;integer a,b,c,d,e,f,g,h,i,j,k,l,z;initial begin z=$fscanf(1<<3,"%d%d%d%d%d%d%d%d%d%d%d%d",a,b,c,d,e,f,g,h,i,j,k,l);d-=a;e-=b;f-=c;g-=a;h-=b;i-=c;j-=a;k-=b;l-=c;$write((g*k*f+j*e*i+d*h*l-j*h*f-d*k*i-g*e*l)/6);end endmodule

stdin

19 99 49
01 23 10
83 01 12
75 88 80

stdout

ERROR: /volume/CODE:1: invalid file descriptor (0x8) given to $fscanf.
          x

stderr

strace