Node.js) 백준 1213번 : 팰린드롬 만들기

https://www.acmicpc.net/problem/1213

1213번: 팰린드롬 만들기

const fs = require('fs');
const input = fs.readFileSync("./dev/stdin").toString().trim();


let count = [];

for (let i = 0; i < input.length; i++) {
  const x = input.charCodeAt(i) - 65;
  if (count[x]) {
    count[x]++;
  } else {
    count[x] = 1
  }
}

const odd = count.filter(v => v % 2 != 0);
if (odd.length > 1) {
  console.log("I'm Sorry Hansoo");
} else {
  let head = '';
  let body = '';
  let tail = '';

  count.forEach((v, i) => {
    if (v % 2 != 0) {
      body += String.fromCharCode(i + 65);
      v--;
    }
    for (let k = 0; k < v / 2; k++) {
      head += String.fromCharCode(i + 65);
      tail = String.fromCharCode(i + 65) + tail
    }
  })
  console.log(head + body + tail)

}