Day2_Part1.js

// https://adventofcode.com/2021/day/2

// const strInput = `forward 5
// down 5
// forward 8
// up 3
// down 8
// forward 2`;

const strInput = `forward 7
down 1
forward 9
forward 4
forward 7
down 8
forward 9
down 2
forward 5
down 3
forward 5
up 7
forward 3
down 7
down 8
up 2
down 4
down 7
forward 1
forward 9
down 9
forward 7
forward 8
up 9
down 6
down 7
forward 1
forward 5
forward 3
down 3
down 4
forward 1
forward 1
forward 7
down 4
forward 6
forward 1
forward 9
forward 4
forward 6
forward 6
down 5
down 4
down 8
up 9
up 9
down 6
down 6
forward 4
forward 1
down 1
forward 7
down 1
forward 3
forward 7
forward 3
up 8
down 7
down 4
forward 7
forward 1
forward 2
down 1
down 4
up 2
up 8
forward 6
forward 5
down 9
up 8
forward 1
up 9
down 7
forward 1
forward 5
up 1
up 7
down 1
down 5
forward 9
down 5
up 5
forward 8
forward 9
down 8
forward 1
down 1
forward 7
down 8
up 4
forward 9
up 1
down 7
forward 4
up 8
down 5
down 2
down 1
forward 5
forward 3
up 5
forward 6
up 1
up 6
up 2
up 6
up 5
down 6
forward 5
down 4
forward 7
up 5
down 3
forward 9
down 5
down 2
up 2
forward 2
down 1
up 3
down 8
forward 8
down 8
forward 6
forward 4
forward 7
forward 6
up 6
down 4
forward 7
forward 9
forward 2
forward 5
down 4
forward 4
forward 9
forward 2
down 2
forward 8
up 8
forward 1
down 6
forward 5
down 4
down 4
down 7
down 5
forward 7
forward 7
down 9
up 9
forward 4
down 2
forward 6
down 4
forward 8
forward 4
up 5
forward 8
down 2
forward 8
forward 6
forward 9
down 7
forward 1
forward 1
forward 1
down 3
forward 2
down 5
forward 3
forward 8
forward 4
forward 7
forward 8
up 7
down 2
up 7
forward 4
forward 7
down 4
down 7
down 3
down 8
forward 2
down 2
forward 2
down 6
forward 2
down 8
forward 2
forward 5
down 5
forward 4
down 7
up 8
up 7
down 2
down 1
forward 4
down 2
forward 9
down 2
down 2
forward 7
forward 3
forward 6
up 8
up 7
forward 1
forward 3
down 9
down 1
forward 8
down 7
up 8
down 3
up 4
forward 9
forward 6
up 6
up 4
down 2
down 4
forward 7
down 2
down 9
forward 1
forward 9
down 6
forward 1
down 8
forward 9
down 9
down 6
up 4
forward 5
up 9
down 2
forward 7
down 1
down 1
down 7
down 4
down 1
down 6
forward 4
forward 6
up 1
down 8
down 4
forward 1
down 5
down 4
up 1
down 9
forward 1
down 1
up 8
forward 8
forward 8
down 5
down 2
down 3
forward 1
down 1
forward 3
down 7
forward 7
forward 1
forward 3
forward 5
forward 3
down 8
forward 1
up 2
up 3
down 4
down 4
up 4
down 4
up 8
down 8
down 7
down 6
forward 5
down 3
forward 2
up 9
down 7
forward 2
down 1
down 3
down 7
down 1
forward 7
down 2
down 9
down 7
up 1
down 5
forward 7
forward 2
forward 7
forward 3
down 2
down 8
up 3
down 3
forward 3
down 2
up 7
up 1
forward 5
down 6
down 3
forward 6
forward 8
forward 2
down 9
down 1
down 1
down 4
forward 8
down 3
up 3
up 4
forward 3
forward 7
down 3
up 6
down 8
up 4
up 3
forward 5
down 9
down 2
forward 6
forward 4
up 6
up 1
forward 4
forward 7
forward 1
forward 8
forward 3
forward 3
forward 9
forward 4
forward 4
forward 4
forward 2
forward 7
down 8
forward 5
up 1
forward 3
forward 7
down 3
forward 7
up 6
forward 4
up 2
down 7
down 4
up 3
up 7
down 1
forward 5
up 7
up 7
down 7
down 9
down 7
forward 5
forward 7
down 1
down 5
down 6
forward 6
up 7
forward 7
forward 6
down 4
down 3
down 9
up 5
down 9
down 3
forward 8
forward 1
forward 5
down 6
forward 7
down 7
forward 8
down 9
up 1
up 2
forward 2
down 4
up 1
forward 2
forward 9
down 8
forward 3
up 3
up 3
forward 3
down 7
down 5
forward 2
up 3
forward 3
forward 5
up 5
forward 3
down 1
down 3
down 6
down 1
forward 7
forward 6
down 5
down 2
forward 7
down 3
forward 2
forward 2
forward 2
down 1
forward 4
forward 5
down 8
up 8
up 7
down 7
forward 9
down 8
forward 1
forward 6
up 3
forward 8
up 9
down 6
down 9
up 4
down 1
forward 1
up 7
down 4
forward 7
forward 4
down 2
forward 3
forward 4
down 7
forward 5
up 8
down 9
down 3
forward 3
forward 8
down 7
forward 1
up 7
down 7
forward 7
down 9
down 6
down 3
down 1
up 5
up 6
forward 8
down 8
up 1
forward 6
up 2
down 6
down 7
down 5
forward 7
up 3
up 6
down 3
up 9
forward 9
down 2
down 4
up 2
forward 7
down 7
up 4
forward 2
down 4
forward 7
up 9
forward 4
forward 9
down 8
up 2
up 2
forward 2
up 8
forward 1
forward 8
forward 8
down 9
forward 6
up 1
down 3
down 4
down 6
forward 6
up 6
down 2
down 1
down 1
forward 9
forward 2
down 7
down 8
down 6
down 3
forward 1
up 6
up 4
forward 3
down 1
forward 6
down 8
forward 6
forward 5
down 3
down 5
up 2
down 7
forward 8
down 8
up 3
down 4
down 3
down 4
up 9
up 6
forward 5
forward 8
down 8
forward 1
forward 8
down 1
down 3
down 4
down 6
forward 3
down 8
down 9
down 3
forward 3
forward 2
forward 2
down 1
up 7
down 6
up 2
down 9
down 4
down 3
down 5
down 4
forward 4
up 8
forward 1
down 9
down 3
down 3
down 8
down 5
up 6
up 5
down 7
down 3
down 7
forward 1
up 5
down 1
forward 1
down 7
down 9
down 3
forward 1
forward 7
down 8
forward 5
up 5
forward 2
down 6
forward 2
down 2
forward 2
up 7
down 2
down 5
down 2
forward 7
forward 2
forward 4
down 2
down 7
down 6
forward 9
down 8
down 3
down 6
forward 7
down 3
down 4
down 7
down 7
down 1
up 8
up 7
up 6
down 8
up 8
forward 8
down 2
down 4
forward 7
forward 4
down 5
down 4
down 3
forward 6
up 9
down 1
down 3
down 4
down 7
up 3
up 4
forward 1
up 4
down 9
up 4
up 3
down 1
down 2
forward 5
up 4
down 1
down 4
down 8
down 1
up 6
down 6
forward 8
forward 7
down 5
down 6
down 5
down 6
down 9
forward 6
down 6
down 7
forward 3
down 2
down 9
up 2
down 6
forward 2
forward 6
forward 4
down 4
forward 8
forward 2
forward 7
forward 4
down 9
forward 6
down 6
forward 1
down 4
down 5
forward 5
up 5
forward 7
up 2
down 9
forward 9
down 9
forward 9
forward 3
forward 7
forward 5
forward 1
down 5
forward 5
down 3
down 2
up 9
down 7
down 2
forward 3
down 8
down 6
down 7
up 5
up 9
down 6
down 8
down 5
down 8
forward 4
forward 5
down 2
down 1
forward 6
down 6
forward 9
forward 2
forward 1
down 3
forward 8
forward 6
up 7
forward 5
down 4
up 7
down 6
down 3
up 8
forward 5
forward 5
down 1
down 7
forward 2
down 5
forward 3
forward 6
forward 6
up 5
down 4
down 2
forward 7
up 8
forward 5
up 7
forward 6
forward 6
forward 6
up 7
down 1
down 4
down 4
forward 5
down 5
up 7
down 7
forward 8
down 6
down 2
forward 3
down 8
up 3
down 2
forward 7
down 1
forward 3
up 1
up 4
down 4
up 6
down 1
down 2
forward 9
up 8
forward 3
down 2
forward 3
down 7
up 6
forward 9
down 3
down 9
up 5
down 9
down 6
forward 8
forward 5
down 8
forward 5
forward 9
up 1
down 3
up 2
down 1
down 2
down 8
forward 9
forward 9
down 7
down 7
down 5
down 1
down 7
up 1
up 1
forward 8
down 6
up 8
down 7
down 1
forward 1
forward 4
down 9
up 2
down 6
forward 2
down 4
forward 7
up 8
down 3
forward 9
down 7
up 7
down 6
down 9
down 2
up 7
down 3
down 9
forward 7
down 7
up 6
down 5
down 4
up 1
down 1
up 7
up 9
down 1
forward 6
forward 3
down 5
down 1
up 8
forward 9
forward 6
down 1
up 3
down 2
forward 3
up 6
down 5
down 3
up 7
down 8
down 5
down 3
forward 6
up 8
down 4
forward 3
forward 5
forward 9
forward 1
up 4
forward 8
forward 9
forward 1
up 9
up 4
forward 4
forward 4
forward 8
up 5
up 2
down 7
down 4
up 5
down 5
forward 6
up 8
down 5
down 7
down 3
up 2
up 2
forward 3
forward 5
forward 1
forward 9
forward 1
down 2
down 2
up 6
up 6
down 5
down 3
down 4
forward 4
down 6
up 6
forward 8
down 9
forward 2
forward 6
down 7
forward 3
down 2
down 5
up 3
forward 6
forward 7
forward 3
forward 4
down 9
up 9
forward 7
down 8
forward 1
down 2
up 5
up 9
forward 8
up 5
forward 7
up 6
forward 9
down 6
forward 4
down 4
forward 7
up 8
down 8
down 7
down 9
up 1
down 5
forward 6
down 9
down 2
down 2
down 6
down 6
forward 8
forward 5
up 7
forward 9
forward 3
forward 8
forward 8
down 7
up 1
down 4
forward 7
up 5
down 9
down 7
forward 8
down 3
up 2
down 7
forward 3
up 8
forward 4
up 2
forward 1
forward 4
forward 5
forward 3
forward 6
down 9
up 7
forward 7
up 6
down 2
down 5
forward 2
forward 8
down 3
forward 6
down 6
forward 4
up 3
forward 3
down 4
up 3
forward 6
forward 7
down 5
forward 5
down 9
forward 7
down 5
down 6
forward 9`;

const arrInput = strInput.split('\n').map((str) =>
  str.split(' ').map((str, i) => {
    if (i === 1) {
      return parseInt(str.trim());
    } else {
      return str.trim().toLowerCase();
    }
  }),
);

let iHorizontalPos = 0;
let iDepth = 0;
for (let iIndex = 0; iIndex < arrInput.length; iIndex++) {
  if (arrInput[iIndex][0] === 'down') {
    iDepth += arrInput[iIndex][1];
  } else if (arrInput[iIndex][0] === 'up') {
    iDepth -= arrInput[iIndex][1];
  } else if (arrInput[iIndex][0] === 'forward') {
    iHorizontalPos += arrInput[iIndex][1];
  }
}
console.log('iHorizontalPos :>> ', iHorizontalPos);
console.log('iDepth :>> ', iDepth);
iFinalAnswer = iDepth * iHorizontalPos;
console.log('iFinalAnswer :>> ', iFinalAnswer);