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LeetCode

LeetCode 714: Best Time to Buy and Sell Stock with Transaction Fee

2026-05-17·2 分鐘

LeetCode Medium Dynamic-Programming State-Machine

LeetCode 714 解題筆記，依照原始 learning note 重新整理

LeetCode 3932: Count K-th Roots in a Range

2026-05-17·2 分鐘

LeetCode Medium Binary-Search Math

LeetCode 3932 解題筆記：答案是 floor(r^(1/k)) - floor((l-1)^(1/k))，開根號用整數二分避免浮點誤差，0 也要算

LeetCode 3931: Check Adjacent Digit Differences

2026-05-17·1 分鐘

LeetCode Easy String

LeetCode 3931 解題筆記：檢查每一對相鄰數字的差的絕對值都不超過 2

LeetCode 309: Best Time to Buy and Sell Stock with Cooldown

2026-05-17·2 分鐘

LeetCode Medium Dynamic-Programming State-Machine

LeetCode 309 解題筆記，依照原始 learning note 重新整理

LeetCode 198: House Robber

2026-05-17·1 分鐘

LeetCode Medium Dynamic-Programming

LeetCode 198 解題筆記，依照原始 learning note 重新整理

LeetCode 188: Best Time to Buy and Sell Stock IV

2026-05-17·3 分鐘

LeetCode Hard Dynamic-Programming State-Machine

LeetCode 188 解題筆記，依照原始 learning note 重新整理

LeetCode 123: Best Time to Buy and Sell Stock III

2026-05-17·3 分鐘

LeetCode Hard Dynamic-Programming State-Machine

LeetCode 123 解題筆記，依照原始 learning note 重新整理

LeetCode 122: Best Time To Buy And Sell Stock II

2026-05-17·2 分鐘

LeetCode Medium Dynamic-Programming Greedy State-Machine

LeetCode 122 解題筆記，依照原始 learning note 重新整理

LeetCode 121: Best Time To Buy And Sell Stock

2026-05-17·2 分鐘

LeetCode Easy Dynamic-Programming State-Machine

LeetCode 121 解題筆記，依照原始 learning note 重新整理

LeetCode 53: Maximum Subarray

2026-05-10·2 分鐘

LeetCode Medium Dynamic-Programming Kadane

LeetCode 53 解題筆記，依照原始 learning note 重新整理

LeetCode 413: Arithmetic Slices

2026-05-10·3 分鐘

LeetCode Medium Dynamic-Programming

LeetCode 413 解題筆記，依照原始 learning note 重新整理

LeetCode 983: Minimum Cost For Tickets

2026-05-07·3 分鐘

LeetCode Medium Dynamic-Programming

LeetCode 983 解題筆記，依照原始 learning note 重新整理