1508. Range Sum of Sorted Subarray Sums.cpp

#include <vector>
using namespace std;
class Solution {
public:
    int rangeSum(vector<int>& nums, int n, int left, int right)
    {
        vector<int> arr;
        for (int i = 0; i < nums.size(); i++) {
            for ()
        }
    }
};