Challenge2024>ProblemDay 1>Input

type InputData = {
  data1: Array<number>,
  data2: Array<number>,
};

type OccurenceData = {
  [key: number]: number,
};

const solution: Fn = async ({ data1, data2 }) => {
  const task1 = sort(data1);
  const task2 = sort(data2);
  const [sorted1, sorted2] = await Promise.all([task1, task2]);

  let result = 0;
  for (let i = 0; i < data1.length; i++) {
    result += Math.abs(sorted1[i] - sorted2[i]);
  }
  return result;
};

const solution: Fn = async ({ data1, data2 }) => {
  const task1 = countOccurence(data1);
  const task2 = countOccurence(data2);
  const [counted1, counted2] = await Promise.all([task1, task2]);

  let result = 0;
  for(const key in counted1) {
    const value = Number(key);
    if (counted2[value]) {
      result += value * counted2[key] * counted1[key];
    }
  }
  return result;
};

const countOccurence: CountFn = async (data) => {
  const promise = new Promise<OccurenceData>((resolve) => {
    setTimeout(() => {
      const counted: OccurenceData = {};

      for (const value of data) {
        if (counted[value]) {
          counted[value] += 1;
        } else {
          counted[value] = 1;
        }
      }

      resolve(counted);
    });
  });

  return promise;
};