nadesiko, 226 bytes

Result

WA

Duration

732ms

Code [DL]

a=[]f=[]i=-6標準入力取得時(s)
t=sを" "で区切る
i=i+3もしi<0ならf=t
違えば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(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と表示

stdin

97 93 57
03 33 26
54 78 01
96 66 32

stdout

stderr

/usr/lib/node_modules/nadesiko3/src/plugin_node.js:470
        callback(line)
        ^

TypeError: callback is not a function
    at Interface.<anonymous> (/usr/lib/node_modules/nadesiko3/src/plugin_node.js:470:9)
    at emitOne (events.js:116:13)
    at Interface.emit (events.js:211:7)
    at Interface._onLine (readline.js:282:10)
    at Interface._normalWrite (readline.js:424:12)
    at ReadStream.ondata (readline.js:141:10)
    at emitOne (events.js:116:13)
    at ReadStream.emit (events.js:211:7)
    at addChunk (_stream_readable.js:263:12)
    at readableAddChunk (_stream_readable.js:250:11)

strace