Subarray Sum In Range
HardGiven n integers and two integers L and R (L <= R), count the number of contiguous non-empty subarrays whose sum S satisfies L <= S <= R.
Input format:
- First line: n L R
- Second line: n integers
Print a single integer. Prefix sums can be large, and the answer can exceed a 32-bit integer.
Constraints
1 <= n <= 10^5 -10^9 <= nums[i] <= 10^9 -10^14 <= L <= R <= 10^14