Depth First Search and Breadth First Search Algorithm to Open th

  • 时间：2020-09-10 13:03:17
  • 分类：网络文摘
  • 阅读：118 次
There are N rooms and you start in room 0. Each room has a distinct number in 0, 1, 2, …, N-1, and each room may have some keys to access the next room. Formally, each room i has a list of keys rooms[i], and each key rooms[i][j] is ... ...

How to Remove Zero Sum Consecutive Nodes from Linked List using

  • 时间：2020-09-10 13:03:17
  • 分类：网络文摘
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Given the head of a linked list, we repeatedly delete consecutive sequences of nodes that sum to 0 until there are no such sequences. After doing so, return the head of the final linked list. You may return any such answer. (Note that in ... ...

How to Design Underground System using Several Hash Maps?

  • 时间：2020-09-10 13:03:17
  • 分类：网络文摘
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Implement the class UndergroundSystem that supports three methods: 1. checkIn(int id, string stationName, int t) A customer with id card equal to id, gets in the station stationName at time t. A customer can only be checked into one place ... ...

Sum of Multiples of 3 and 5

  • 时间：2020-09-10 12:55:33
  • 分类：网络文摘
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If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23. Find the sum of all the multiples of 3 or 5 below 1000. Let’s declare a Javascript function to sum up ... ...

Sum of Even Fibonacci Numbers

  • 时间：2020-09-10 12:55:33
  • 分类：网络文摘
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Each new term in the Fibonacci sequence is generated by adding the previous two terms. By starting with 1 and 2, the first 10 terms will be: 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, … By considering the terms in the Fibonacci sequence whos... ...

Can we Construct K Palindrome Strings?

  • 时间：2020-09-10 12:55:33
  • 分类：网络文摘
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Given a string s and an integer k. You should construct k non-empty palindrome strings using all the characters in s. Return True if you can use all the characters in s to construct k palindrome strings or False otherwise. Example 1: Input... ...

What is the largest prime factor of the number 600851475143 ?

  • 时间：2020-09-10 12:55:33
  • 分类：网络文摘
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The prime factors of 13195 are 5, 7, 13 and 29. What is the largest prime factor of the number 600851475143 ? We can start prime number 2 and keep dividing the Number until it can’t, then move to next prime number. Repeat this proce... ...

Find the largest palindrome From the product of two 3-digit numb

  • 时间：2020-09-10 12:55:33
  • 分类：网络文摘
  • 阅读：109 次
A palindromic number reads the same both ways. The largest palindrome made from the product of two 2-digit numbers is 9009 = 91 × 99. Find the largest palindrome made from the product of two 3-digit numbers. To check if a number in Javasc... ...

Recursive Depth First Search Algorithm to Compute the Diameter o

  • 时间：2020-09-10 12:55:33
  • 分类：网络文摘
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Given a binary tree, you need to compute the length of the diameter of the tree. The diameter of a binary tree is the length of the longest path between any two nodes in a tree. This path may or may not pass through the root. Example: Give... ...

Number of Steps to Reduce a Number in Binary Representation to O

  • 时间：2020-09-10 12:55:33
  • 分类：网络文摘
  • 阅读：123 次
Given a number s in their binary representation. Return the number of steps to reduce it to 1 under the following rules: If the current number is even, you have to divide it by 2. If the current number is odd, you have to add 1 to it. It&#... ...