Problem
You are given an array and two indices L and R. Use pointers to print the sum of elements from index L to R inclusive.
Input format
Input
input.txt
- First line: integer N (1 ≤ N ≤ 100) - Second line: N space-separated integers - Third line: two integers L and R (0 ≤ L ≤ R < N)
Output format
Output
output.txt
- A single integer: the sum from L to R
Example
input
5 1 2 3 4 5 1 3
output
9
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Sample cases (from the problem)
Sample Case 1
Input
5 1 2 3 4 5 1 3
Expected output
9
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