Given an integer array nums
, handle multiple queries of the following type:
nums
between indices left
and right
inclusive where left <= right
.Implement the NumArray
class:
NumArray(int[] nums)
Initializes the object with the integer array nums
.int sumRange(int left, int right)
Returns the sum of the elements of nums
between indices left
and right
inclusive (i.e. nums[left] + nums[left + 1] + ... + nums[right]
).
Example 1:
Input ["NumArray", "sumRange", "sumRange", "sumRange"] [[[-2, 0, 3, -5, 2, -1]], [0, 2], [2, 5], [0, 5]] Output [null, 1, -1, -3] Explanation NumArray numArray = new NumArray([-2, 0, 3, -5, 2, -1]); numArray.sumRange(0, 2); // return (-2) + 0 + 3 = 1 numArray.sumRange(2, 5); // return 3 + (-5) + 2 + (-1) = -1 numArray.sumRange(0, 5); // return (-2) + 0 + 3 + (-5) + 2 + (-1) = -3
Constraints:
1 <= nums.length <= 104
-105 <= nums[i] <= 105
0 <= left <= right < nums.length
104
calls will be made to sumRange
.