const fs = require("fs");

function parseInputAndCalculateDistance(filePath) {
  const fileContent = fs.readFileSync(filePath, "utf-8");

  const leftList = [];
  const rightList = [];
  fileContent.split("\n").forEach((line) => {
    if (line.trim() !== "") {
      const [left, right] = line.split(/\s+/).map(Number);
      leftList.push(left);
      rightList.push(right);
    }
  });

  function calculateTotalDistance(left, right) {
    left.sort((a, b) => a - b);
    right.sort((a, b) => a - b);

    let totalDistance = 0;
    for (let i = 0; i < left.length; i++) {
      totalDistance += Math.abs(left[i] - right[i]);
    }

    return totalDistance;
  }

  return calculateTotalDistance(leftList, rightList);
}

const filePath = "inputs/1";
const totalDistance = parseInputAndCalculateDistance(filePath);

console.log(totalDistance);