Array-3 solutions

[kalyan-ng22]

No description provided.

[super30admin]

• H-Index.java: The solution is well-implemented. The comments and variable names make the code easy to understand. The logic is clear and concise.
• RotateArrayByKPlaces.java: The solution is efficient and handles edge cases well. The use of a helper method for rotation is a good practice.
• TrapRainwater.java: The solution is optimal and handles the problem efficiently. The logic is straightforward and easy to follow.

Overall, the student has demonstrated a strong understanding of the problems and has provided efficient and correct solutions. The code quality is high, and the solutions are well-optimized.