[백준] 3009번 : 네 번째 점 - Javascript(자바스크립트)

https://www.acmicpc.net/problem/3009

const fs=require('fs')
ip=fs.readFileSync(0).toString().split('\n')
v=ip[0].split(' ').map(Number)
x1=parseInt(v[0])
y1=parseInt(v[1])
x=0
y=0
cx=0
cy=0
for(i=1;i<=2;i++){
    v1=ip[i].split(' ').map(Number)
    x2=parseInt(v1[0])
    y2=parseInt(v1[1])
    if(x1==x2) cx++
    else x=x2
    if(y1==y2) cy++
    else y=y2
}
console.log("%d %d",cx==1?x:x1,cy==1?y:y1)