text: class NumArray:
  
      def __init__(self, nums):
          self.nums = nums
          for i in range(1, len(nums)):
              self.nums[i] += self.nums[i - 1]
          
  
      def sumRange(self, i, j):
          return self.nums[j] - self.nums[i - 1] if i else self.nums[j]