Website Visits Analysis

A website owner wants to analyze the number of visits recorded over a week. Each day, visits can increase or decrease, and you need to provide the total number of visits for any two given days. Input format: - The first line contains an integer W (1 ≤ W ≤ 100,000), the number of days (1 week). - The second line contains W integers, representing the visits recorded for each day. - The third line contains two integers, dayStart and dayEnd (0 ≤ dayStart ≤ dayEnd < W), the range for querying visits. Output format: - Output a single integer: the total number of visits from dayStart to dayEnd (inclusive). Example: Input: 7 200 300 -50 100 400 200 -150 2 5 Output: 950