count-of-range-sum


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Points: 5
Time limit: 30.0s
Memory limit: 250M

Problem type
Allowed languages
Python

Given an integer array nums and two integers lower and upper, return the number of range sums that lie in [lower, upper] inclusive.

Range sum S(i, j) is defined as the sum of the elements in nums between indices i and j inclusive, where i <= j.

  Example 1:

Input: nums = [-2,5,-1], lower = -2, upper = 2 Output: 3 Explanation: The three ranges are: [0,0], [2,2], and [0,2] and their respective sums are: -2, -1, 2.

Example 2:

Input: nums = [0], lower = 0, upper = 0 Output: 1

  Constraints:

1 <= nums.length <= 10⁵
-2³¹ <= nums[i] <= 2³¹ - 1
-10⁵ <= lower <= upper <= 10⁵
The answer is guaranteed to fit in a 32-bit integer.

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