Day 3 Adventofcode 2021

// Adevntofcode Day 3 2021
//leer datos
var datos = [];
var fs = require("fs");
var data = fs.readFileSync("input3.txt", "utf8");
data = data.trim();
datos = data.split(/\n/);
//convertir los datos a String
for (let i = 0; i < datos.length; i++) {
  let str = datos[i];
  str = String(str);
  datos[i] = str.trim();
}

let length = datos.length;

length = datos[length - 1].length;

function Day3Part1(input) {
  let gr = "";
  let er = "";

  for (let j = 0; j < datos[0].length; j++) {
    let count0 = 0;
    let count1 = 0;
    for (let i = 0; i < input.length; i++) {
      let word = input[i];
      if (word[j] == "0") {
        count0++;
      } else {
        count1++;
      }
    }
    if (count0 < count1) {
      er += "0";
      gr += "1";
    } else {
      er += "1";
      gr += "0";
    }
  }
  return { gr, er };
}

function binarioToDecimal(binario) {
  return parseInt(binario, 2);
}

function getbits(input, position) {
  //limpiar datos de espacios y saltos de linea

  let count0 = 0;
  let count1 = 0;
  for (let i = 0; i < input.length; i++) {
    let word = input[i];
    if (word[position] == "0") {
      count0++;
    } else {
      count1++;
    }
  }

  if (count0 < count1) {
    return { oxygen: "1", c02: "0" };
  } else {
    return { oxygen: "0", c02: "1" };
  }
}
function getbitsC02(input, position) {
  //limpiar datos de espacios y saltos de linea

  let count0 = 0;
  let count1 = 0;
  for (let i = 0; i < input.length; i++) {
    let word = input[i];
    if (word[position] == "0") {
      count0++;
    } else {
      count1++;
    }
  }

  if (count0 <= count1) {
    return { oxygen: "1", c02: "0" };
  } else {
    return { oxygen: "0", c02: "1" };
  }
}
//Parte1
console.log(
  binarioToDecimal(Day3Part1(datos).gr),
  binarioToDecimal(Day3Part1(datos).er)
);
//resultado
console.log("Parte 1");
console.log(
  binarioToDecimal(Day3Part1(datos).gr) * binarioToDecimal(Day3Part1(datos).er)
);

function oxygen_generator_rating(position, input, value) {
  let arr = [];
  if (input.length > 0) {
    if (position == input[0].length - 1) {
      console.log("final");
      if (input[0][position] == "1") {
        return input[0];
      } else {
        return input[1];
      }
    } else {
      for (let i = 0; i < input.length; i++) {
        let word = input[i];
        if (word[position] == value) {
          arr.push(input[i]);
        }
      }
    }
    return arr;
  } else {
    return arr;
  }
}

let a = oxygen_generator_rating(0, datos, getbits(datos, 0).oxygen);

for (let i = 1; i < datos[0].length; i++) {
  if (a.length == 2) {
    console.log("stop");
    if (a[0][i] == "1") {
      a = a[0];
    } else {
      a = a[1];
    }
    break;
  } else {
    a = oxygen_generator_rating(i, a, getbits(a, i).oxygen);
  }
}

let b = oxygen_generator_rating(0, datos, getbitsC02(datos, 0).c02);

for (let i = 1; i < datos[0].length; i++) {
  if (b.length == 2) {
    console.log("stop");
    if (b[0][i] == "0") {
      b = b[0];
    } else {
      b = b[1];
    }
    break;
  } else if (b.length == 1) {
    break;
  } else {
    b = oxygen_generator_rating(i, b, getbitsC02(b, i).c02);
  }
}
//Parte 2
console.log(binarioToDecimal(a), binarioToDecimal(b));
console.log("Parte 2");
console.log(binarioToDecimal(a) * binarioToDecimal(b));