Given an array nums of n integers and an integer target, are there elements a, b, c, and d in nums such that a + b + c + d = target? Find all unique quadruplets in the array which gives the sum of target. Note: The solution set must not contain dupli…
Given a collection of intervals, merge all overlapping intervals. For example,Given [1,3],[2,6],[8,10],[15,18],return [1,6],[8,10],[15,18]. Show Tags Array Sort 这题其实想好思路很好解决,对于框,如果下个框开始在 其中间,则连在一起,否则单独为一个,这需要按start 排序便可以了,因为类中写自定义比较函数比较麻烦,所以一次写了好几个…
题目 Given a collection of intervals, merge all overlapping intervals. For example, Given [1,3],[2,6],[8,10],[15,18], return [1,6],[8,10],[15,18]. 分析 给定几个区间,要求合并重叠区间,返回结果: AC代码 /** * Definition for an interval. * struct Interval { * int start; * int en…
problem: Given a collection of intervals, merge all overlapping intervals. For example, Given [1,3],[2,6],[8,10],[15,18], return [1,6],[8,10],[15,18]. Hide Tags Array Sort 题意:给定数组区间,合并有覆盖或者相邻的区间 thinking: (1)一開始我想到用hash table的方法,开一个总区间跨度的数组.对于有区间覆盖的数…
Given a collection of intervals, merge all overlapping intervals. For example, Given [1,3],[2,6],[8,10],[15,18], return [1,6],[8,10],[15,18]. 这道和之前那道Insert Interval 插入区间 很类似,这次题目要求我们合并区间,之前那题明确了输入区间集是有序的,而这题没有,所有我们首先要做的就是给区间集排序,由于我们要排序的是个结构体,所以我们要定义自…
原题地址:https://oj.leetcode.com/problems/merge-intervals/ 题意: Given a collection of intervals, merge all overlapping intervals. For example,Given [1,3],[2,6],[8,10],[15,18],return [1,6],[8,10],[15,18]. 解题思路:先将区间按照每个start的值来排序,排好序以后判断一个区间的start值是否处在前一个区间…
Given a collection of intervals, merge all overlapping intervals. For example,Given [1,3],[2,6],[8,10],[15,18],return [1,6],[8,10],[15,18]. 题目的意思是将相交得区间合并,典型的贪心算法 首先将区间先按照start进行排序, 然后保存先前区间的start和end 如果当前的start > 先前的end,说明当前的区间与之前的区间不想交,则将先前的区间放入结果中…
