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496. Next Greater Element I
You are given two arrays (without duplicates) nums1 and nums2 where nums1’s elements are subset of nums2. Find all the next greater numbers for nums1' ...
分类:其他好文   时间:2020-04-15 15:17:52    阅读次数:68
381. Insert Delete GetRandom O(1) - Duplicates allowed
问题: 设计数据结构,使得以下三个方法的时间复杂度都为O(1) 允许插入重复数字。 insert(val): Inserts an item val to the collection. remove(val): Removes an item val from the collection if ...
分类:其他好文   时间:2020-04-14 20:59:50    阅读次数:76
Search in Rotated Sorted Array II
Search in Rotated Sorted Array Problem Follow up for "Search in Rotated Sorted Array":What if duplicates are allowed? Would this affect the run-time c ...
分类:其他好文   时间:2020-04-12 14:17:08    阅读次数:54
【LeetCode链表】删除排序链表中的重复元素 II
题目描述 给定一个排序链表,删除所有含有重复数字的节点,只保留原始链表中 没有重复出现 的数字。 示例: 题目链接 :https://leetcode cn.com/problems/remove duplicates from sorted list ii/ 做这题之前,可以先做 "删除排序链表中 ...
分类:编程语言   时间:2020-04-10 00:36:26    阅读次数:74
leetcode 82 Remove Duplicates from Sorted List II
/** * Definition for singly-linked list. * struct ListNode { * int val; * ListNode *next; * ListNode(int x) : val(x), next(NULL) {} * }; */ class Solu ...
分类:其他好文   时间:2020-04-01 16:35:39    阅读次数:55
leetcode 381 Insert Delete GetRandom O(1) - Duplicates allowed
class RandomizedCollection { unordered_map<int,unordered_set<int>> m; vector<int> vals; public: /** Initialize your data structure here. */ Randomized ...
分类:其他好文   时间:2020-03-31 12:39:20    阅读次数:61
Leetcode 217. 存在重复元素 (Contains Duplicate)
题目 Given an array of integers, find if the array contains any duplicates. Your function should return true if any value appears at least twice in the ...
分类:其他好文   时间:2020-03-29 19:40:21    阅读次数:65
pandas常用数据清洗方法
数据预处理常用函数 df.duplicated() :判断各行是重复,False为非重复值。 df.drop_duplicates():删除重复行 df.fillna(0):用实数0填充na df.dropna():按行删除缺失数据,使用参数axis=0;按列删除缺失值,使用参数axis=1,how ...
分类:其他好文   时间:2020-03-27 17:17:54    阅读次数:128
26. Remove Duplicates from Sorted Array
Problem : Given a sorted array nums, remove the duplicates in place such that each element appear only once and return the new length. Do not allocate ...
分类:其他好文   时间:2020-03-26 01:03:12    阅读次数:78
377. Combination Sum IV
Given an integer array with all positive numbers and no duplicates, find the number of possible combinations that add up to a positive integer target. ...
分类:其他好文   时间:2020-03-22 19:30:38    阅读次数:66
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