How to Construct Binary Tree from String (Binary Tree Deserializ

  • 时间：2020-09-24 11:54:15
  • 分类：网络文摘
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You need to construct a binary tree from a string consisting of parenthesis and integers. The whole input represents a binary tree. It contains an integer followed by zero, one or two pairs of parenthesis. The integer represents the root&#... ...

How to Serialize and Deserialize Binary Tree?

  • 时间：2020-09-24 11:54:15
  • 分类：网络文摘
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Serialization is the process of converting a data structure or object into a sequence of bits so that it can be stored in a file or memory buffer, or transmitted across a network connection link to be reconstructed later in the same or ano... ...

WXT pre-sale is now live – is it worth it?

  • 时间：2020-09-24 11:54:15
  • 分类：网络文摘
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wirex-cryptocurrency-card According to here, you can now buy WXT if your are registered with Wirex (Free Registeration). The WXT is distributed on a first-come-first-serve basis at a fixed price of $0.01 per token for the duration of the sa... ...

Algorithm to Count the Minimum Add to Make Parentheses Valid

  • 时间：2020-09-24 11:54:15
  • 分类：网络文摘
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Given a string S of ‘(‘ and ‘)’ parentheses, we add the minimum number of parentheses ( ‘(‘ or ‘)’, and in any positions ) so that the resulting parentheses string is valid. Formally, a paren... ...

Javascript’s toFixed Implementation without Rounding

  • 时间：2020-09-24 11:54:15
  • 分类：网络文摘
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NodeJs / Javascript In Javascript, you can use Number.prototype.toFixed(n) that will return a string version that has n decimal places. For example, 1 2 (3).toFixed(3) // "3.000" (3.15).toFixed(3)... ...

The Dynamic Programming Algorithm to Compute the Minimum Falling

  • 时间：2020-09-24 11:54:15
  • 分类：网络文摘
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Given a square array of integers A, we want the minimum sum of a falling path through A. A falling path starts at any element in the first row, and chooses one element from each row. The next row’s choice must be in a column that is ... ...

Algorithm to Delete a Character to Make a Valid Palindrome

  • 时间：2020-09-24 11:54:15
  • 分类：网络文摘
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Given a non-empty string s, you may delete at most one character. Judge whether you can make it a palindrome. Example 1: Input: “aba” Output: True Example 2: Input: “abca” Output: True Explanation: You could delete ... ...

Two Pointer Algorithm to Find Maximum Two Sum Less Than K

  • 时间：2020-09-24 11:54:15
  • 分类：网络文摘
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Given an array A of integers and integer K, return the maximum S such that there exists i < j with A[i] + A[j] = S and S < K. If no i, j exist satisfying this equation, return -1. Example 1: Input: A = [34,23,1,24,75,33,54,8], K = 60... ...

Several Algorithms to Compute the Score of Parentheses

  • 时间：2020-09-24 11:54:15
  • 分类：网络文摘
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Given a balanced parentheses string S, compute the score of the string based on the following rule: () has score 1 AB has score A + B, where A and B are balanced parentheses strings. (A) has score 2 * A, where A is a balanced parentheses ... ...

Using Reduce to Count the Array in Javascript

  • 时间：2020-09-24 11:54:15
  • 分类：网络文摘
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NodeJs / Javascript Let’s say, we have an array in Javascript, and we want to group the elements, ount their occurences and store the final results in a key-value dictionary. Input Array: 1 const cars = ['BMW', 'Audi', 'Audi', '... ...