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Leetcode Problem 1918. Kth Smallest Subarray Sum

1918. Kth Smallest Subarray Sum

Leetcode Solutions

Binary Search with Sliding Window

  1. Initialize the binary search boundaries: low as the smallest element in nums and high as the sum of all elements in nums.
  2. Perform binary search:
    • Calculate the middle value mid between low and high.
    • Use a sliding window to count the number of subarrays with sums less than or equal to mid.
    • If the count is greater than or equal to k, adjust high to mid.
    • Otherwise, adjust low to mid + 1.
  3. Continue the binary search until low meets high.
  4. Return low as the kth smallest subarray sum.
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Brute Force with Sorting

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