Leetcode Problem 2447. Number of Subarrays With GCD Equal to K

2447. Number of Subarrays With GCD Equal to K

Leetcode Solutions

Brute Force with Early Stopping

  1. Initialize a counter ans to 0 to keep track of the number of valid subarrays.
  2. Iterate over the array with two nested loops, with the outer loop index i representing the start of the subarray and the inner loop index j representing the end of the subarray.
  3. For each subarray defined by i and j, calculate the GCD of its elements.
  4. If the GCD is equal to k, increment ans.
  5. If the GCD becomes less than k, break out of the inner loop as no further subarrays starting at i can have a GCD equal to k.
  6. Return the value of ans.
UML Thumbnail

Segment Tree for GCD Queries

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