advent of code 2019

firstDay.js

const fs = require('fs');

const buffer = fs.readFileSync('input');
const file = buffer.toString().split('\n');

function calcConsumption(amount) {
    const tmp = Math.floor(+amount / 3) - 2;
    return (tmp > 0) ? tmp + calcConsumption(tmp) : 0;
}

const result = file.reduce((acc, item) => acc + calcConsumption(item), 0);

console.log(result)

secondDay.js

const fs = require('fs');

const buffer = fs.readFileSync('input');
let content = buffer.toString().split(',');
content = content.map( i => +i);

content[1] = 12;
content[2] = 2;

const operations = {
    1: (x ,y) => x + y,
    2: (x, y) => x * y,
    99: () => { throw new Error('done')}
};

function calculate(inp) {
    const tmp = [...inp];
    for(let i = 0; i < tmp.length; i++) {
        try {
            const op = tmp[i];
            const a = tmp[tmp[++i]];
            const b = tmp[tmp[++i]];
            const placeToPut = tmp[++i];
            const result = operations[op](a, b);
            // console.log(op, a, b, placeToPut, result, i);
            tmp[placeToPut] = result;
        } catch(e) {
            if (e.toString() === 'Error: done') break;
            else throw e;
        }
    }

    return tmp;
}

function getExpectedResult(){
    const expectedResult = 19690720;
    const a = 12;
    const b = 2;
    let noun, verb;
    
    for (let i=0; i<content.length; i++) {
        for(let j=0; j<content.length; j++) {
            const tmp = [...content];
            noun = a + i;
            verb = b + j;

            tmp[1] = noun;
            tmp[2] = verb;

            const result = calculate(tmp);

            if (result[0] === expectedResult) {
                return 100 * noun + verb;
            }
        }
    }
}

const result = getExpectedResult();
console.log(result);

const mainResult = calculate(content);
console.log(mainResult[0]);

function isEqual(a, b) {
    return a.reduce( (acc, item, index) => acc && (item === b[index]), true );
}

let test = [1,0,0,0,99];
let expected = [2,0,0,0,99]
let result = calculate(test);
console.log(isEqual(expected, result));

test = [2,3,0,3,99];
expected = [2,3,0,6,99];
result = calculate(test);
console.log(isEqual(expected, result));

test = [2,4,4,5,99,0];
expected = [2,4,4,5,99,9801];
result = calculate(test);
console.log(isEqual(expected, result));

test = [1,1,1,4,99,5,6,0,99];
expected = [30,1,1,4,2,5,6,0,99];
result = calculate(test);
console.log(isEqual(expected, result));