Node.js) 백준 28431번: 양말 짝 맞추기

https://www.acmicpc.net/problem/28431

28431번: 양말 짝 맞추기

const input = require('fs')
	.readFileSync('./dev/stdin')
	.toString()
	.trim()
	.split('\n')
	.map((v) => v.trim());
const map = new Map();
input.forEach((v) => {
	if (map.has(v)) {
		const cnt = map.get(v);
		map.set(v, cnt + 1);
	} else {
		map.set(v, 1);
	}
});
map.forEach((v, k) => {
	if (v % 2 == 1) console.log(k);
});