Rockethon2015 C question Second price auction probability dp
Question: n people are bidding for a product. The following n intervals are given to indicate that the price of each person is a random number (Equal Probability) in the interval) then the first place must pay for the second place's bidding price (which can be tied for the first place.
/*************************************** * ****************** File name: c. cpp author: kereo create time
This is the complex part-you must make sure everyone's bids are, update correct that those proxy have, bids L OTS to winners, notify buyers who have been, and outbid perform.
The "the" the "the" code to add a bid.
Function dobid (ItemID, Bidderid, price, optional maxprice, optional maxitems)
' Set variables and create objects
strConnectionString = "dsn=myauction; Uid=username; Pwd=password;database=myauctiondb "
Set rst = Server.CreateObject ("ADODB.") Recordset ")
' Check to the If a bi
A lot of people who have done Baidu bidding ranking ads will be feeling, that is more spectacular burning money ah! In fact, it did not bring much business opportunities, but advertising costs doubled daily. The key words price is slightly low, cannot show, set the expense limit, the system also reminds the loss how many customers. Consumption outweighs the gains, there are competitors malicious clicks, but more responsibility lies in Baidu Viper, sitting in the profits of the fisherman. After m
powerful one-stop platform.
Baidu auction One-stop platform, one-stop management now Baidu's main business: Search and promotion and Network Alliance promotion, including search promotion and also include PC-side search engine promotion and mobile search engine promotion, Network Alliance promotion including PC End Network Alliance promotion and mobile Network Alliance promotion.
Baidu launched the one-stop platform for the ultimate goal or make mo
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When displaying the details of the product, also should let the user can bid, so at this time to the user to make a judgment, I am lazy, directly with deamweaver to do this form of the check, only the English note to change into Chinese, but because in judging the aspect of the new bid is a little special, So a little bit of change is made to the functions that DW generates.
The following things are simple, what else do you want? Show the goods that ha
I think we all have a deep understanding of the search engine market was a monopoly, the rules began to money. Search engines, no matter which industry which category, the largest flow, the highest commercial value of the word, has already been the auction rankings occupied. The natural rankings have been squeezed to eight or nine places. Ask, even if seoer put a lot of energy, a lot of resources to the natural ranking to do the first, but also how mu
SEO is the majority of small and medium-sized enterprises and personal webmaster most commonly used by the flow of the means, with the master SEO technology More and more people, competition is more and more fierce, various means, all kinds of technology has been developed, SEO technology has become a low-cost snatch search flow of the best means.
But the search engine's main profit point is also on the search page, so and SEO has a certain conflict of interest points (many small and medium-siz
= = "") echo "no photo"; else echo "
When displaying the details of the product, also should let the user can bid, so at this time to the user to make a judgment, I am lazy, directly with deamweaver to do this form of the check, only the English note to change into Chinese, but because in judging the aspect of the new bid is a little special, So a little bit of change is made to the functions that DW generates.
The following things are simple, what else do you want? Show the goods that ha
For many web site operations, Baidu bid promotion has become an indispensable means of marketing promotion. The following is a Baidu, Google and Soso auction promotion of an IDC website for example.
From the above figure (Third party statistics) can understand that the site from the search engine to obtain traffic, by Baidu to obtain the flow of nearly 80%, and then Tencent, Google are less than 10%, this shows that doing a good job of
it's a keyword that no one is bidding on, it's worth it. Unless you're the only one who's found a super lucrative industry or product. But the probability is very low, then the author through the second situation Analysis of auction ranking mechanism and price calculation formula, you can understand: when the quality is high, lower bid may also be ranked by the front. The formula may be so expressed that many people can not understand it.
I give an
} - for(i =1; I ) to{//sort by bid descending + intindex; - floatMax; the structcharge temp; *Max =Order[i].price; $ for(j = i+1; J )Panax Notoginseng { - if(Order[j].price >=max) { theMax =Order[j].price; +index =J; A } the } +temp =Order[i]; -Order[i] =Order[index]; $Order[index] =temp; $ } - for(i =1; I ) -{//check each line of command, set the price of buy command as open prices the Long Longs
Note:
The interval size is 100000000. Then, each time you query how many values in a interval are not marked and all unmarked values in the interval are marked.
Query times: 100000
Analysis:
This question gives me the first feeling that the line segment tree cannot be opened if the line segment tree is 10 ^ 7.
And then the query set once again exert its infinite power
For the interval of each query
Point all the values to the farthest value he can point.
The total number of queries can be contr
Codeforces 513C Second price auction probability dp expectation
Question link: Click the open link
Question:
There are n people bidding for a product. The following n intervals are given to indicate that each person's price is a random number (Equal Probability) in the interval)
The first place must pay for the second place)
The expectation of payment.
Ideas:
Enumerate the money paid, and then calculate the probability of paying the money, multiply an
]=mappartitionsrdd[1]attextfileatA. Howmany items were sold?==> val count = auctionrdd.map (bid = bid (0)). Distinct (). COUNT ()According to the Auctionid to the weight can: each record according to "," separate, then go heavy, then count#获取第一列, that is, get Auctionid, still with map# can understand the following line, because Auctionrdd is array[array[string]] then the map of each parameter type is array[string],Since ActionId is the first bit of the array, that is to get the first element of
. paxos consistency algorithm is the one described above, the request and response are sent with a message (the response will be marked with the corresponding motion number to prevent confusion). Use persistent storage to ensure that acceptor fail to remember the necessary information. acceptor must persist the response before sending a response. The next step is to describe a mechanism that guarantees that no two motions are numbered. The proposer selects the motion number from each disjoint co
to have a large cache to store, the amount of storage is huge, because all the combinations can generate dynamic features, in addition, the speed requirements of the update is also relatively high. I'll cite a couple of examples, such as a cookie (u) and Creative (a) that can be combined, but this group is not too much of a problem, because cookies and creative, whether you do dynamic or static features, can get too little statistical information, Again such as Gender (U) and topic (c), this co
functions:User: Registration, login, change password, logoutProducts: Add new items, view in the shoot goods, bidBid record: Submit bid record, dealSecond optimization(1) Remove a lot of redundant code(2) Add a new product image upload and Product description information integrated in a page, the details can refer to my article: http://www.zifangsky.cn/2016/02/struts2 file Upload instance/(3) Replace the logic tags in the Struts1 used in the original project with the popular JSTL tags, as detai
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In the display of product details, should also allow the user to bid, so at this time to the user under the new price to make a judgment, I am more lazy, directly with deamweaver to do this form of calibration, only the English explanation of the change into Chinese, but because in judging the new bid is a bit special, So I made a little change to the functions generated by DW.
The following things are simple, what else? Show the items that have ended
Coca-Cola Auction host sale Price how much
Coca-Cola Electric Competition host configuration price exposure
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Use tutorials:
Anchor Management Platform Link: http://admin.egame.qq.com/
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