https://www.acmicpc.net/problem/2741
const fs = require('fs');
const file = process.platform === "linux" ? '/dev/stdin' : './input.txt';
let input = fs.readFileSync(file).toString();
let result = '';
for (let i = 1; i <= input; i++) {
result += i + `\n`;
}
console.log(result);