Leetcode Problem 2569. Handling Sum Queries After Update

2569. Handling Sum Queries After Update

Leetcode Solutions

Segment Tree with Lazy Propagation

  1. Initialize a Segment Tree based on nums1.
  2. Initialize a variable to keep track of the sum of nums2.
  3. Iterate over each query in queries.
    • If it's a type 1 query, use the Segment Tree to flip the values in the specified range.
    • If it's a type 2 query, query the Segment Tree for the count of ones in nums1 and update the sum of nums2 accordingly.
    • If it's a type 3 query, append the current sum of nums2 to the result list.
  4. Return the result list containing the answers to all type 3 queries.
UML Thumbnail

Brute Force with Optimization for Type Queries

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