[백준] 4299번 : AFC 윔블던 - Javascript(자바스크립트)

https://www.acmicpc.net/problem/4299

const fs=require('fs')
let ip=fs.readFileSync('/dev/stdin').toString().split(' ')
var a=parseInt(ip[0])
var b=parseInt(ip[1])
if((a+b)%2==1||a<b) console.log(-1)
else{
    var n=(a+b)/2
    var m=a-n
    console.log("%d %d",n,m)
}