AdventOfCode2020/day_1/task_1.js

const fs = require('fs');
const file = fs.readFileSync(__dirname + '/input.txt').toString('utf-8');
const arr = file.split('\n');

arr.forEach(num => {
    arr.forEach(num2 => {
        if (Number(num) + Number(num2) == 2020) {
            console.log(`Found match: ${num} + ${num2} (${num * num2})`);
        }
    });
});