Node.js)백준 17087번: 숨바꼭질 6

https://www.acmicpc.net/problem/17087

17087번: 숨바꼭질 6

const fs = require('fs');
const input = fs.readFileSync("./dev/stdin").toString().trim().split('\n').map(v=>v.split(' ').map(Number));
const [N,S] = input[0]
const brother = input[1].map(v=>Math.abs(S-v));

if(N==1){
  console.log(brother[0])
}else{
  let gcd =GCD(brother[0],brother[1]);
  for(let i = 1; i<brother.length; i++){
    gcd =GCD(gcd,brother[i]);
  }
  
  console.log(gcd)
}

function GCD(a,b){
  if(b==0)return a;
  return a>b? GCD(b,a%b): GCD(a,b%a)
}