Beats 100%|C/C++矩陣冪次方解Leetcode難題3700 Number of ZigZag Arrays II

Beats 100%|C/C++矩陣冪次方解Leetcode難題3700  Number of ZigZag Arrays II

[codes on Leetcode 3700]https://leetcode.com/problems/number-of-zigzag-arrays-ii/solutions/8354788/symmetrymatrix-exponential149ms-beats-10-9hxf/

[codes on Leetcode 3699]https://leetcode.com/problems/number-of-zigzag-arrays-i/solutions/8352758/use-symmetryprefixdpbeats-9352-by-anwend-xcjj/

在這段影片中，我將深入解析如何使用 矩陣快速冪 (Matrix Exponentiation) 來高效解決 LeetCode 難題 3700：Number of ZigZag Arrays II。這題是 ZigZag Array 系列的進階版本，對時間複雜度有極高要求。

C, Py3, C++解Leetcode 3612 與難題3614 Process String with Special Operations

C Py3 C++解Leetcode 3612 與難題3614 Process String with Special Operations

一個字串問題Leetcode 3612，用C++或Python是易如反掌，用C語言就難多了，然而這個解題經驗，順便用來解所謂hard 3614. Process String with Special Operations II

Master LeetCode 1861 | Efficient Loop Strategy for Rotating the Box | Beats 100%

C++ C Py3 loop速解Leetcode 1861  Rotating the Box

一連數日Leetcode都是"rotate"的問題，這些問題都解完了嗎?先解今天的

計數排序與greedy 2 pointer解Leetcode 1877 Minimize Maximum Pair Sum in Array

計數排序與greedy 2 pointer解Leetcode 1877  Minimize Maximum Pair Sum in Array 重點是理解為何Greedy方法可行，code很簡單，就排序sort, counting sort, radix sort都來一遍

[Py3 一行解請進]

C C++ Py3 DP與OOP解Leetcode 3573 Best Time to Buy and Sell Stock V

C C++ Py3  DP與OOP解Leetcode 3573  Best Time to Buy and Sell Stock V

[Py3 code請進]

py3 C C++階乘模運算速解Leetcode 3577 Count the Number of Computer Unlocking Pe...

py3 C C++階乘模運算速解Leetcode 3577  Count the Number of Computer Unlocking Permutations

[1-liner Py3請進]

Py3 C C++ prefix sum解Leetcode 3381 Maximum Subarray Sum With Length Div...

Py3 C C++ prefix sum解Leetcode 3381  Maximum Subarray Sum With Length Divisible by K

Very similar to Kadane's algorithm

[Py3 code請進]

C++ py3 C Rust速解Leetcode 1526 Minimum Number of Increments on Subarrays ...

C++ py3 C Rust adjacent difference與loop速解Leetcode 1526 Minimum Number of Increments on Subarrays to Form a Target Array

[Py3一行解請進]

Py3 C++ C 2pointer速解Leetcode 11Container With Most Water

Py3 C++ C 2pointer速解Leetcode 11Container With Most Water

[Py3 code請進]

C C++ GCD LCM解Leetcode難題2197 Replace Non Coprime Numbers in Array[含Py3 code]

C C++ GCD LCM解Leetcode難題2197  Replace Non Coprime Numbers in Array

用binary Euclidean algorithm定義gcd，然後定義lcm之後就是用stack

[Py3 code請進]

C++C py3 log4 prefix sum, bits解Leetcode難題3495 Minimum Operations to Mak...

C++C py3 log4 prefix sum/bits解Leetcode難題3495  Minimum Operations to Make Array Elements Zero

ceil(log4(x)) 可以透過 clz 計算；將 expSum 定義為部分和來計算。

[Py3 code請進]

C++ C Py3 Rust數bits解Leetcode 2749 Minimum Operations to Make the Intege...

C++ C Py3 Rust數bits解Leetcode 2749  Minimum Operations to Make the Integer Zero

[Py3解請進]

C/C++/Py3使用荷蘭旗演算3 pointer解Leetcode 75 Sort Colors

C C++ Py3使用荷蘭旗演算3 pointer解Leetcode 75 Sort Colors

一次走訪演算採用於荷蘭旗演算法。

[Py3解請進]

Python C C++ 2 pointer速解Leetcode 2337 Move Pieces to Obtain a String

Python C C++ 2 pointer速解Leetcode 2337  Move Pieces to Obtain a String

多日Leetcode的問題都可用2-pointer法來解，今日2337. Move Pieces to Obtain a String也不例外，這次就用C/C++/Python三個語言來解[Python解請進]

C++ Python C速解Leetcode 344 Reverse String

C++ Python C速解Leetcode 344  Reverse String

交換索引對 (i, n-1-i)。在C的實作中，交換並沒有使用額外的空間，只是透過xor！

C++ DFS BFS貪婪三法解Leetcode農地問題1992 Find All Groups of Farmland

C++ DFS BFS貪婪三法解Leetcode農地問題1992  Find All Groups of Farmland

採用三種方式解題，一是DFS, 二是BFS，前兩法都很標準。農地因為都是矩形，第三法採貪婪演算找出矩形右下角，簡單又快速。

python C++速解Leetcode 1544 make the string great

python C++速解Leetcode 1544 make  the string great

基本上算是stack解法，但實作的語言C, C++, python只需要善用個別字串的特性，無須使用stack，大幅加快計算速度，C語言解答請進，並加上最佳C++解

python C C++陣列迴圈速解Leetcode 3005 Count Elements With Maximum Frequency

python C C++陣列迴圈速解Leetcode 3005  Count Elements With Maximum Frequency

陣列迴圈就能解答的，何須用到hash table(C++ unordered_map)簡單的問題可用簡單的 資料結構解答，迴圈就是迴圈、陣列就是陣列(內有python code)

python C C++速解Leetcode 19 Remove Nth Node From End of List並考慮memory leaks問題

python C C++速解Leetcode 19 Remove Nth Node From End of List並考慮memory leaks問題

其實刷題不要只是貪快還是要考慮Memory Leaks，解老題目19 Remove Nth Node From End of List要特別別考慮，另別是C/C++使用者

python C++計算 indegree解Leetcode 997 Find the Town Judge

python C++計算 indegree解Leetcode 997  Find the Town Judge

使用圖形解決方案。

由於信任中的每一對 e=(a, b) 實際上表示一種信任關係，可以將其視為有向邊。C++程式請進

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