Given an array of N numbers and two indices, determine the sum of the numbers in the array between (and including) those two indices.
Take this array for example:
13 7 20 1 8
The sum of the numbers between and including the indices 1 and 4 is:
7 + 20 + 1 + 8 = 36
The first line of the input will contain three integers N, A, B (0 < N < 100, 0 ≤ A < B < N). A and B are the two indices.
The following line will contain N integers, each between 1 and 1000.
Print the sum of the subarray.
| Input | Output |
|---|---|
5 1 4 13 7 20 1 8 | 36 |