나이순 정렬

const input = require("fs").readFileSync("/dev/stdin").toString().split("\n");

const sort = (input) => {
	const n = parseInt(input[0]);
	const arr = input
		.slice(1, n + 1)
		.map((v) => v.split(" "))
		.map((v) => [parseInt(v[0]), v[1]]);

	const countingArr = Array.from({length: 201}, () => []);
	for (let i = 0; i < arr.length; i++) {
		countingArr[arr[i][0]].push(arr[i][1]);
	}

	for (let i = 0, arrIdx = 0; i < 201; i++) {
		if (countingArr[i].length === 0) continue;
		for (let j = 0; j < countingArr[i].length; j++) {
			arr[arrIdx++] = `${i} ${countingArr[i][j]}`;
		}
	}

	console.log(arr.join("\n"));
};

sort(input);