LeetCode Solutions
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LeetCode Solutions | #14 — Longest Common Prefix
Horizontal, vertical, divide & conquer, binary search — four ways to find the LCP
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LeetCode Solutions | #13 — Roman to Integer
Look ahead, subtract, and conquer — the Roman numeral decoder
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LeetCode Solutions | #9 — Palindrome Number
From string trick to half‑reversal — clean integer logic
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LeetCode Solutions | #2 — Add Two Numbers
From grade-school addition to linked list mastery
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LeetCode Solutions | #1 — Two Sum
From brute force to O(n) — a friendly journey for beginners