Скачать или смотреть Amazon SDE Interview 2026 🔥 Reverse Vowels in a String | Java DSA Mastery

In this problem, you must reverse only the vowels (a, e, i, o, u) in a string while keeping all consonants in the same position.
For example:
👉 Input: "hello"
👉 Output: "holle"
How to solve?
✔ Use two pointers → left & right
✔ Move left pointer until it finds a vowel
✔ Move right pointer until it finds a vowel
✔ Swap both vowels
✔ Continue until both pointers cross
Time Complexity: O(n)
Space Complexity: O(1)
This problem tests:
➡️ Two-pointer technique
➡️ String manipulation
➡️ Optimized in-place algorithms
➡️ Amazon DSA pattern knowledge

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