题目链接:Running Time of Quicksort Challenge In practice, how much faster is Quicksort (in-place) than Insertion Sort? Compare the running time of the two algorithms by counting how many swaps or shifts each one takes to sort an array, and output the dif…

QuickSort In the previous challenge, you wrote a partition method to split an array into 2 sub-arrays, one containing smaller elements and one containing larger elements. This means you 'sorted' half the array with respect to the other half. Can you…

https://www.hackerrank.com/challenges/how-many-substrings/problem 题解 似乎是被毒瘤澜澜放弃做T3的一道题(因为ASDFZ有很多人做过,当然,他换了一道更毒瘤的--) 仓鼠在最后一天的时候提了一嘴然后我发现依旧菜菜的不会--(因为太菜模拟天天被吊打) 仓鼠好神仙啊%%%(烤熟了味道怎么样啊) 这道题三个数据结构结合在一起使用,但是感觉却没有那么码农,就是直接把板子套一套(当然板子不熟另当别论),用namespace的话可以降低编码…

问题描述: 在hadoop中运行应用,出现了running beyond virtual memory错误.提示如下: Container [pid=28920,containerID=container_1389136889967_0001_01_000121] is running beyond virtual memory limits. Current usage: 1.2 GB of 1 GB physical memory used; 2.2 GB of 2.1 GB virtual…

In the Quicksort challenges, you sorted an entire array. Sometimes, you just need specific information about a list of numbers, and doing a full sort would be unnecessary. Can you figure out a way to use your partition code to find the median in an a…

In this challenge you need to print the data that accompanies each integer in a list. In addition, if two strings have the same integers, you need to print the strings in their original order. Hence, your sorting algorithm should be stable, i.e. the…

Sherlock and The Beast Sherlock Holmes is getting paranoid about Professor Moriarty, his archenemy. All his efforts to subdue Moriarty have been in vain. These days Sherlock is working on a problem with Dr. Watson. Watson mentioned that the CIA has b…

Running Median Time Limit: 1000MS   Memory Limit: 65536K Total Submissions: 3406   Accepted: 1576 Description For this problem, you will write a program that reads in a sequence of 32-bit signed integers. After each odd-indexed value is read, output…

Candy Replenishing Robot Find the Minimum Number 直接模拟 Melodious password dfs输出方案 Poles 题意:有多个仓库,只能从后面的仓库运动前面的仓库,现在要把仓库合并成k个,移动一个仓库i到另个仓库j的代价是costi*(xi-xj),问最小代价. 解一下就会发现是个斜率优化,做k次就可以了 #include<cstdio> #include<cstring> #include<algorithm>…

在jxzz上发现的一个做题网站,每周都有训练题,题目质量……前三题比较水,后面好神啊,而且类型差不多,这周似乎是计数专题…… Army Game 然后给出n*m,问需要多少个小红点能全部占领 解法:乘法... Best Divisor 给一个数,问一个数的约数中数字和最大的约数. 解法:直接分解质因数就可以啦. Twins 孪生质数定义为两个质数之差为2,问n,m之间有多少个孪生质数(n<=m<=10^9,m-n<=10^6) 解法:显然直接判断区间内相邻的两个奇数是否为质数就可以啦.然…