1
class NumArray {
2
 public:
3
  vector<int> arr;
4
  NumArray(vector<int> &nums) {
5
    arr = nums;
6
  }
7

8
  int sumRange(int left, int right) {
9
    int sum = 0;
10
    for (int i = left; i <= right; i++) sum += arr[i];
11
    return sum;
12
  }
13
};