Patterns: Sliding Window & Two Pointers

function longestSubarray(nums: number[], k: number): number {
  let left = 0;
  let currentSum = 0;
  let maxLen = 0;

  for (let right = 0; right < nums.length; right++) {
    currentSum += nums[right];

    while (currentSum > k && left <= right) {
      currentSum -= nums[left];
      left++;
    }

    maxLen = Math.max(maxLen, right - left + 1);
  }

  return maxLen;
}