#!/bin/node

const fs = require('fs');

fs.readFile('input.txt', (err, data) => {
    const numbers = data.toString().split('\n').map(n => parseInt(n));
    for (let i = 0; i < numbers.length; i++) {
        for (let j = i + 1; j < numbers.length; j++) {
            if (numbers[i] + numbers[j] === 2020) {
                console.log(numbers[i] * numbers[j]);
            }
        }
    }

    for (let i = 0; i < numbers.length; i++) {
        for (let j = i + 1; j < numbers.length; j++) {
            for (let k = j + 1; k < numbers.length; k++) {
                if (numbers[i] + numbers[j] + numbers[k] === 2020) {
                    console.log(numbers[i] * numbers[j] * numbers[k]);
                }
            }
        }
    }
});