stuck, 134 bytes

Result

WA

Duration

514ms

Code [DL]

ssss["x:map(int,x.split())"m["s:lambda a,b,c,d,e,f,g,h,i=[s[i+3]-s[i%3]for i in range(9)]:(a*e*i+b*f*g+c*d*h-a*h*f-b*i*d-c*g*e)//6"m0&

stdin

12 71 05
95 07 91
33 29 59
70 48 06

stdout

stderr

Traceback (most recent call last):
  File "stuck.py", line 167, in <module>
    main()
  File "stuck.py", line 162, in main
    process(prog, stack=[], t=0, nest=0)
  File "stuck.py", line 55, in process
    stack = plugins[plugin].CMDS[char](stack)
  File "plugins/stuck_base.py", line 80, in map_
    return s + [map(eval('lambda '+la),l)]
  File "<string>", line 1, in <lambda>
TypeError: unsupported operand type(s) for -: 'list' and 'list'

strace