freecodecamp--freecodecamp/curriculum/challenges/english/blocks/daily-coding-challenges-javascript/697a49e6ff50d756c9b69363.md

id, title, challengeType, dashedName

id	title	challengeType	dashedName
697a49e6ff50d756c9b69363	Challenge 186: 2026 Winter Games Day 7: Speed Skating	28	challenge-186

--description--

Given two arrays representing the lap times (in seconds) for two speed skaters, return the lap number where the difference in lap times is the largest.

The first element of each array corresponds to lap 1, the second to lap 2, and so on.

--hints--

largestDifference([26.11, 25.80, 25.92, 26.23, 26.07], [25.93, 25.74, 26.53, 26.11, 26.30]) should return 3.

assert.equal(largestDifference([26.11, 25.80, 25.92, 26.23, 26.07], [25.93, 25.74, 26.53, 26.11, 26.30]), 3);

largestDifference([27.04, 25.94, 26.22, 26.07, 26.18], [25.59, 25.80, 26.11, 26.01, 26.23]) should return 1.

assert.equal(largestDifference([27.04, 25.94, 26.22, 26.07, 26.18], [25.59, 25.80, 26.11, 26.01, 26.23]), 1);

largestDifference([25.82, 25.90, 26.05, 26.00, 26.48], [25.85, 25.92, 26.07, 25.98, 25.95]) should return 5.

assert.equal(largestDifference([25.82, 25.90, 26.05, 26.00, 26.48], [25.85, 25.92, 26.07, 25.98, 25.95]), 5);

largestDifference([25.88, 26.10, 25.95, 26.05, 26.00], [25.90, 26.55, 25.92, 26.03, 26.01]) should return 2.

assert.equal(largestDifference([25.88, 26.10, 25.95, 26.05, 26.00], [25.90, 26.55, 25.92, 26.03, 26.01]), 2);

largestDifference([25.92, 26.01, 26.05, 25.88, 26.12], [25.95, 26.00, 26.03, 26.45, 26.10]) should return 4.

assert.equal(largestDifference([25.92, 26.01, 26.05, 25.88, 26.12], [25.95, 26.00, 26.03, 26.45, 26.10]), 4);

--seed--

--seed-contents--

function largestDifference(skater1, skater2) {

  return skater1;
}

--solutions--

function largestDifference(skater1, skater2) {
  let maxDiff = -1;
  let lapNumber = 1;

  for (let i = 0; i < skater1.length; i++) {
    const diff = Math.abs(skater1[i] - skater2[i]);
    if (diff > maxDiff) {
      maxDiff = diff;
      lapNumber = i + 1;
    }
  }

  return lapNumber;
}