cisco 2821

Title Link: BZOJ-2821Problem analysisBecause the force is online, so can't use Mo team. You can use chunking to do this.This is done by dividing the number of n into n/x blocks, each with a block size of X. Pre-F[I][J], which indicates the number of occurrences of the numbers from block I to block J is even.This complexity is n * (n/x).Then put the number and position in the structure, according to the number of the first keyword, the position of the second keyword sort. This is to facilitate th

Question link: Http://acm.hdu.edu.cn/showproblem.php? PID = 1, 2821 Question meaning: To a matrix of N * n, some locations are empty, and some locations have boxes (A represents a box, B represents two, and so on ). Let you select an empty position as the starting point, and then select a direction (top, bottom, left, right) for each step until it hits the box, and then remove the box at this position, all the remaining boxes are merged to the next po

The main topic: give a sequence, to find the number of occurrences in a period of a positive even numbers.Train of thought: 50000, sub-block. The main thing is to deal with two arrays, one is the answer to the whole block, the space complexity is O (√n*√n), there is a prefix and the number of times each block appears, the Space Complexity O (n*√n). Then it was violence. The code is messy, and you need to analyze the complexity of the time based on for.This question probably does not need to read

City of Angels 2821City of Angels 2821 Time Limit: 1 s space limit: 128000 KB title level: Gold Question View running resultsDescription Description There is A railway station in Angel City. Every train enters the station from,Then exit the station from B. To schedule trains, the railway station has parking tracks and can store 5 trains. It is known that the order from A to the station is 1, 2, 3 ....... Now we will give you a scheduling scheme to de

HDU-2821-Pusher (DFS)Problem DescriptionPusherBoy is an online game http://www.hacker.org/push. There is an R * C grid, and there are piles of blocks on some positions. The goal is to clear the blocks by pushing into them.You shoshould choose an empty area as the initial position of the PusherBoy. then you can choose which direction (U for up, D for down, L for left and R for right) to push. once the direction is chosen, the PusherBoy will walk ahead

This article describes how to make the right choice for a CISCO router. Here I will share some of my experiences in choosing a Cisco router. It may be helpful to everyone. When deploying a LAN, A vro is one of the essential devices. Cisco is the leader in the field of routers and other network equipment. He is also a brand that many network administrators must co

Half a year five acquisitions Cisco intensive integration for self-redemptionWu MicroCisco, a "takeover guru", recently announced a new deal.The acquisition was Cloudlock, a cloud security company, with a total transaction price of $293 million. This is the fifth takeover deal that Cisco has launched this year.As the world's largest network equipment manufacturer, Cisco