leetcode - 随笔分类 - 狂奔的蜗牛163

Python3解leetcode Reach a Number

摘要：问题描述： You are standing at position 0 on an infinite number line. There is a goal at position target. On each move, you can either go left or right. Du 阅读全文

posted @ 2019-09-24 14:55 狂奔的蜗牛163 阅读(293) 评论(0) 推荐(0)

Python3解leetcode Min Cost Climbing Stairs

摘要：问题描述： On a staircase, the i-th step has some non-negative cost cost[i]assigned (0 indexed). Once you pay the cost, you can either climb one or two ste 阅读全文

posted @ 2019-09-23 15:30 狂奔的蜗牛163 阅读(281) 评论(0) 推荐(0)

Python3解leetcode Kth Largest Element in a Stream

摘要：问题描述： Design a class to find the kth largest element in a stream. Note that it is the kth largest element in the sorted order, not the kth distinct el 阅读全文

posted @ 2019-09-20 14:36 狂奔的蜗牛163 阅读(328) 评论(0) 推荐(0)

Python3解leetcode Count Binary Substrings

摘要：问题描述： Give a string s, count the number of non-empty (contiguous) substrings that have the same number of 0's and 1's, and all the 0's and all the 1's 阅读全文

posted @ 2019-09-20 10:26 狂奔的蜗牛163 阅读(324) 评论(0) 推荐(0)

Python3解leetcode Average of Levels in Binary Tree

摘要：问题描述： Given a non-empty binary tree, return the average value of the nodes on each level in the form of an array. Example 1: 思路：考虑BFS算法，因为这是第一次碰到BFS算阅读全文

posted @ 2019-09-18 10:38 狂奔的蜗牛163 阅读(270) 评论(0) 推荐(0)

Python3解leetcode Subtree of Another Tree

摘要：问题描述： Given two non-empty binary trees s and t, check whether tree t has exactly the same structure and node values with a subtree of s. A subtree of 阅读全文

posted @ 2019-09-16 09:09 狂奔的蜗牛163 阅读(324) 评论(0) 推荐(0)

Python3解leetcode Number of Boomerangs

摘要：问题描述： Given n points in the plane that are all pairwise distinct, a "boomerang" is a tuple of points (i, j, k) such that the distance between i and je 阅读全文

posted @ 2019-08-07 20:14 狂奔的蜗牛163 阅读(298) 评论(0) 推荐(0)

Python3解leetcode First Bad Version

摘要：问题描述： You are a product manager and currently leading a team to develop a new product. Unfortunately, the latest version of your product fails the qua 阅读全文

posted @ 2019-08-07 11:27 狂奔的蜗牛163 阅读(305) 评论(0) 推荐(0)

Python3解leetcode Path Sum III

摘要：问题描述： You are given a binary tree in which each node contains an integer value. Find the number of paths that sum to a given value. The path does not 阅读全文

posted @ 2019-08-07 10:37 狂奔的蜗牛163 阅读(367) 评论(0) 推荐(0)

Python3解leetcode N-ary Tree Level Order Traversal

摘要：问题描述： Given an n-ary tree, return the level order traversal of its nodes' values. (ie, from left to right, level by level). For example, given a 3-ary 阅读全文

posted @ 2019-08-06 14:08 狂奔的蜗牛163 阅读(298) 评论(0) 推荐(0)

Python3解leetcode Binary Tree PathsAdd DigitsMove Zeroes

摘要：问题描述： Given an array nums, write a function to move all 0's to the end of it while maintaining the relative order of the non-zero elements. Example: N 阅读全文

posted @ 2019-07-17 14:13 狂奔的蜗牛163 阅读(176) 评论(0) 推荐(0)

Python3解leetcode Binary Tree PathsAdd Digits

摘要：问题描述： Given a non-negative integer num, repeatedly add all its digits until the result has only one digit. Example: Follow up:Could you do it without 阅读全文

posted @ 2019-07-16 15:06 狂奔的蜗牛163 阅读(241) 评论(0) 推荐(0)

Python3解leetcode Binary Tree Paths

摘要：问题描述： Given a binary tree, return all root-to-leaf paths. Note: A leaf is a node with no children. Example: 思路：二叉树的问题，首先考虑递归算法，用深度优先搜索。为了体现模块化思想，一般讲阅读全文

posted @ 2019-07-15 19:54 狂奔的蜗牛163 阅读(234) 评论(0) 推荐(0)

Python3解leetcode Lowest Common Ancestor of a Binary Search Tree

摘要：问题描述： Given a binary search tree (BST), find the lowest common ancestor (LCA) of two given nodes in the BST. According to the definition of LCA on Wik 阅读全文

posted @ 2019-07-11 07:42 狂奔的蜗牛163 阅读(298) 评论(0) 推荐(0)

Python3解leetcode Isomorphic Strings

摘要：问题描述： Given two strings s and t, determine if they are isomorphic. Two strings are isomorphic if the characters in s can be replaced to get t. All occ 阅读全文

posted @ 2019-07-09 16:27 狂奔的蜗牛163 阅读(169) 评论(0) 推荐(0)

Python3解leetcode Count Primes

摘要：问题描述： Count the number of prime numbers less than a non-negative number, n. Example: 思路： 1、最暴力的方法就是循环遍历，用两个for循环嵌套实现，但是整个代码运行时间太长，提交通不过 2、采用'Sieve of 阅读全文

posted @ 2019-07-09 10:13 狂奔的蜗牛163 阅读(274) 评论(0) 推荐(0)

Python3解leetcode Maximum SubarrayHouse Robber

摘要：问题描述： You are a professional robber planning to rob houses along a street. Each house has a certain amount of money stashed, the only constraint stopp 阅读全文

posted @ 2019-07-03 16:10 狂奔的蜗牛163 阅读(180) 评论(0) 推荐(0)

Python3解leetcode Rotate Array

摘要：问题描述： Given an array, rotate the array to the right by k steps, where k is non-negative. Example 1: Example 2: Note: Try to come up as many solutions 阅读全文

posted @ 2019-07-01 08:55 狂奔的蜗牛163 阅读(214) 评论(0) 推荐(0)

Python3解leetcode Factorial Trailing Zeroes

摘要：问题描述： Given an integer n, return the number of trailing zeroes in n!. Example 1: Example 2: Note: Your solution should be in logarithmic time complexi 阅读全文

posted @ 2019-06-30 15:10 狂奔的蜗牛163 阅读(282) 评论(0) 推荐(0)

Python3解leetcode Linked List Cycle

摘要：问题描述： Given a linked list, determine if it has a cycle in it. To represent a cycle in the given linked list, we use an integer poswhich represents the 阅读全文

posted @ 2019-06-25 08:42 狂奔的蜗牛163 阅读(259) 评论(0) 推荐(0)

随笔分类 - leetcode