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Little Valentine liked playing with binary trees very much. Her favorite game was constructing randomly looking binary trees with capital letters in t 阅读全文
posted @ 2021-02-17 18:02
布拉多1024
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A Strange Tree (S-tree) over the variable set Xn = {x1*,x2,...,xn*} is a binary tree representing a Boolean function f : {0*,1}n → {0,*1}. Each path o 阅读全文
posted @ 2021-02-17 18:01
布拉多1024
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You are given a string consisting of parentheses () and []. A string of this type is said to be correct: (a) if it is the empty string (b) if A and B 阅读全文
posted @ 2021-02-17 18:00
布拉多1024
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