node, 144 bytes

Result

WA

Duration

595ms

Code [DL]

[,,,a,b,c,d,e,f,g,h,i]=(""+require("fs").readFileSync()).split(/\s/).map((e,i,x)=>e-x[i%3]);console.log((a*e*i+b*f*g+c*d*h-a*f*h-b*d*i-c*e*g)/6)

stdin

01 52 33
15 09 42
42 82 78
06 51 75

stdout

stderr

fs.js:646
  return binding.open(pathModule._makeLong(path), stringToFlags(flags), mode);
                 ^

TypeError: path must be a string or Buffer
    at Object.fs.openSync (fs.js:646:18)
    at Object.fs.readFileSync (fs.js:551:33)
    at Object.<anonymous> (/volume/CODE:1:104)
    at Module._compile (module.js:635:30)
    at Object.Module._extensions..js (module.js:646:10)
    at Module.load (module.js:554:32)
    at tryModuleLoad (module.js:497:12)
    at Function.Module._load (module.js:489:3)
    at Function.Module.runMain (module.js:676:10)
    at startup (bootstrap_node.js:187:16)

strace