by@lip_of_cygnus
WA
504ms
freq = {} x=[] i=0 while gets() for word in $_.split('/\s/') a=word.split(" ") end x[i]=a i=i+1 end k=x[1][0].to_i - x[0][0].to_i printf("%d %d\n",k,x[3][2])
32 09 23 48 80 39 19 81 64 21 74 84
16 84