laptopRental.js

function laptopRentals(times) {
  if (times.length === 0) return 0;
  times.sort((a, b) => a[0] - b[0]);
  let usedLaptops = 0;

  const startTimes = times.map((a) => a[0]).sort((a, b) => a - b);
  const endTimes = times.map((a) => a[1]).sort((a, b) => a - b);

  let start = 0;
  let end = 0;

  while (start < times.length) {
    if (startTimes[start] >= endTimes[end]) {
      usedLaptops--;
      endIterator++;
    }
  }

  return usedLaptops;
}

const times = [
  [0, 1],
  [0, 2],
  [0, 3],
  [1, 4],
  [2, 6],
  [3, 4],
];