Leetcode Problem 1901. Find a Peak Element II
Leetcode Solutions
Binary Search on Columns
- Initialize left and right pointers to the first and last column indices respectively.
- Perform a binary search:
a. Calculate the mid column.
b. Find the maximum element in the mid column and its corresponding row index.
c. Check if the maximum element is a peak:
- If it is greater than its left and right neighbors (or does not have them), return its position.
- If the left neighbor is greater, move the right pointer to mid - 1.
- If the right neighbor is greater, move the left pointer to mid + 1.
- Repeat steps 2a to 2c until the left pointer is less than or equal to the right pointer.
- Return the position of the peak element found.
Linear Search for Peak Element
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