rprogn, 102 bytes

Result

WA

Duration

503ms

Code [DL]

read " " split "v1" =
read " " split "v2" =
read " " split "v3" =
read " " split "v4" =

v1 2 index p

stdin

40 03 85
94 57 31
42 08 22
29 23 71

stdout

nil

stderr

strace