1 primary, but 51 alt picks. Still well-known
数学方面，学会了100以内的认读，学会了单、双数的概念。
，这一点在heLLoword翻译官方下载中也有详细论述
* 时间复杂度：O(len1 + len2)，空间复杂度：O(len2)（栈+Map的空间）
These are packed into a 16-bit state vector:，详情可参考爱思助手下载最新版本
Comparison between Thomas Knoll’s algorithm and the N-convex algorithm, using an 8-colour irregular palette. Left to right: original image, Knoll, N-convex ().
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