nadesiko, 103 bytes

Result

WA

Duration

706ms

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-f
aを表示

stdin

01 14 36
50 19 66
78 21 26
15 63 25

stdout

[]
[ 49 ]
[ 49, <2 empty items>, 77 ]
[ 49, <2 empty items>, 77, <2 empty items>, 14 ]

stderr

strace