Solving Merge Sorted Array In Place using Two Pointers.

Problem

Solve Merge Sorted Array In Place.

Pattern

This problem demonstrates the Two Pointers pattern.

Approach

Left and right pointer technique.

Solution 

  // solution

Complexity

O(n)

Best Practices

  • Identify the pattern before coding — pattern recognition saves time
  • Handle edge cases: empty input, single element, duplicates
  • Use descriptive variable names even in timed interviews
  • Test with the provided examples plus one custom case