Completed Two Pointer - 1

[sreevardhan1099]

Two Pointer - 1

Problem1 (https://leetcode.com/problems/sort-colors/)
Problem2 (https://leetcode.com/problems/3sum/)
Problem3 (https://leetcode.com/problems/container-with-most-water/)

[super30admin]

• The student has demonstrated a strong understanding of the two-pointer technique across all three problems.
• The code is well-commented, which aids in understanding the logic.
• The solutions are efficient and handle edge cases appropriately.
• One minor suggestion: In Problem3.java, the variable m is declared but not used. It can be removed to avoid confusion.