C++ Py3 bitmask速解Leetcode 762 Prime Number of Set Bits in Binary Representation

C++ Py3 bitmask速解Leetcode 762  Prime Number of Set Bits in Binary Representation

這段影片示範如何使用計數位元和位元遮罩(bit mask)，用幾行程式碼解決這個問題。

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this video shows how to use count bits & bitmask to solve this question in few lines. 

[codes on Leetcode]https://leetcode.com/problems/prime-number-of-set-bits-in-binary-representation/solutions/7595294/c-bits-count-vs-pascal-trianglebeats-100-2r67/

Py3 C++迴圈與計數解Leetcode 696 Count Binary Substrings

Py3 C++迴圈與計數解Leetcode 696  Count Binary Substrings

Leetcode 696. Count Binary Substrings雖然標示為easy，也沒那麼trivial，花了一番功夫才解出branchless C++。而一般回圈解倒是不難，但須要思考一下

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Leetcode 696. Count Binary Substrings, though marked as easy, isn't exactly trivial; it took me some effort to solve it in branchless C++. Solving the general loop problem isn't difficult, but it needs thinking.

[codes on Leetcode]https://leetcode.com/problems/count-binary-substrings/solutions/7590515/cout-the-successive-1s-0sbeats-100-by-an-7amm/