ruby0.49, 134 bytes

Result

WA

Duration

481ms

Code [DL]

freq = {}
x=[]
i=0
while gets()
    for word in $_.split('/\s/')
a=word.split(" ")
    end
x[i]=a 
i=i+1
end
   printf("%d\n",x[0][0])

stdin

03 90 57
89 16 09
06 98 69
27 34 45

stdout

3

stderr

strace