Suppose Andy and Doris want to choose a restaurant for dinner, and they both have a list of favorite restaurants represented by strings. You need to h ...
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其他好文 时间:
2020-07-29 15:41:09
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86
Given two strings s1, s2, find the lowest ASCII sum of deleted characters to make two strings equal. Example 1: Input: s1 = "sea", s2 = "eat" Output: ...
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其他好文 时间:
2020-07-28 14:45:21
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310
完整性约束 概览 为了防止不符合规范的数据进入数据库,在用户对数据进行插入、修改、删除等操作时,DBMS自动按照一定的约束条件对数据进行监测,使不符合规范的数据不能进入数据库,以确保数据库中存储的数据正确、有效、相容。 约束条件与数据类型的宽度一样,都是可选参数,主要分为以下几种: # NOT NU ...
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其他好文 时间:
2020-07-28 14:33:27
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71
Given two words word1 and word2, find the minimum number of steps required to make word1 and word2 the same, where in each step you can delete one cha ...
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其他好文 时间:
2020-07-28 14:04:15
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77
Given an array of positive integers target and an array initial of same size with all zeros. Return the minimum number of operations to form a target ...
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其他好文 时间:
2020-07-27 15:38:31
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66
# -*- coding: utf-8 -*- # @Time : 2020/7/25 13:59 # @Author : Breeze num1 = 1 while num1 <= 9: num2 = 1 while num2 <= num1: print("{}*{}={}".format(nu ...
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其他好文 时间:
2020-07-27 15:35:12
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53
先序遍历:根-->左-->右的形式 public static void preOrderTraveralWithStsck(Node node){ Stack<Node> stack = new Stack(); //当节点的左右孩子全为空并且,栈空表示遍历完毕 while (node != nu ...
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编程语言 时间:
2020-07-27 09:42:07
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81
题目链接 https://leetcode-cn.com/problems/minimum-depth-of-binary-tree/ 题解一 递归解法 我写的 说明详见注释 // Problem: LeetCode 111 // URL: https://leetcode-cn.com/probl ...
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其他好文 时间:
2020-07-26 19:32:58
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60
链接:https://leetcode-cn.com/problems/minimum-depth-of-binary-tree/ 代码 /** * Definition for a binary tree node. * struct TreeNode { * int val; * TreeNod ...
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其他好文 时间:
2020-07-26 19:03:29
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62
Find Minimum in Rotated Sorted Array II (H) 题目 Suppose an array sorted in ascending order is rotated at some pivot unknown to you beforehand. (i.e., [ ...
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其他好文 时间:
2020-07-26 15:29:37
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58