Leetcode Problem 303. Range Sum Query - Immutable

303. Range Sum Query - Immutable

Leetcode Solutions

Approach: Cumulative Sum

  1. Initialize an array sums of length n + 1, where n is the length of the input array nums. Set sums[0] to 0.
  2. Populate the sums array such that sums[i] is the cumulative sum of nums from index 0 to i - 1.
  3. Implement the sumRange function to return sums[right + 1] - sums[left], which gives the sum of elements between indices left and right.
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Approach: Brute Force

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