nadesiko, 216 bytes

Result

WA

Duration

688ms

Code [DL]

a=[]f=[]i=-6標準入力取得時には(s)
t=区切(s," ")i=i+3もしi<0ならf=t
違a@i=t@0-f@0
a[i+1]=t@1-f@1
a[i+2]=t@2-f@2もしi=6なら表示(a@0*(a@4*a@8-a@5*a@7)+a@1*(a@5*a@6-a@3*a@8)+a@2*(a@3*a@7-a@4*a@6))/6

stdin

53 76 84
40 77 09
55 02 69
40 05 68

stdout

stderr

/usr/lib/node_modules/nadesiko3/src/nako_parser3.js:26
      throw new NakoSyntaxError('構文エラー:' + this.nodeToStr(c), c.line)
      ^

Error: [文法エラー](5): 構文エラー:『/』
    at NakoParser.startParser (/usr/lib/node_modules/nadesiko3/src/nako_parser3.js:26:13)
    at NakoParser.parse (/usr/lib/node_modules/nadesiko3/src/nako_parser3.js:18:23)
    at CNako3.parse (/usr/lib/node_modules/nadesiko3/src/nako3.js:121:24)
    at CNako3.compile (/usr/lib/node_modules/nadesiko3/src/cnako3.js:101:22)
    at CNako3._run (/usr/lib/node_modules/nadesiko3/src/nako3.js:142:19)
    at CNako3.runReset (/usr/lib/node_modules/nadesiko3/src/nako3.js:164:17)
    at CNako3.execCommand (/usr/lib/node_modules/nadesiko3/src/cnako3.js:96:10)
    at Object.<anonymous> (/usr/lib/node_modules/nadesiko3/src/cnako3.js:181:10)
    at Module._compile (module.js:635:30)
    at Object.Module._extensions..js (module.js:646:10)

strace