๐ ์ฝ์ ์ ๋ ฌ์ ์ฌ์ฉํด๋ณด์๋๋ฐ ์๊ฐ์ด๊ณผ ์๋ฌ๊ฐ ๋ฐ์ํ๋ค.
const fs = require('fs');
const input = fs.readFileSync('/dev/stdin').toString().trim().split('\n');
input.shift();
input.sort((a, b) => (a.split(" ")[0] - b.split(" ")[0]));
const result = input.join("\n");
console.log(result);