buys kindles

, when shopping, also need to consider whether the store is normal. This time buys the jewelry, originally is aimed at the cheap, buys one to give the family, but did not want oneself when the sucker! I asked for a shopping invoice from the store, but the shopkeeper wrote the S925 jewelry on a paper like a receipt, 1500 yuan, and there was nothing else. It feels like his house is not going to be invoiced at

technology to analyze the user's purchase behavior, to find often together or the same person to purchase the collection of items, bundling, which is a typical project-based collaborative filtering recommendation mechanism. Items purchased/browsed by others (Customers who bought/see this item Also bought/see): It is also a typical project-based collaborative filtering recommendation application that enables users to find their interests more quickly and easily through social mechanisms.

500,000 yuan, and ordinary retail investors do not play, we can not use stock index futures to hedge risk, can only ask the Bodhisattva bless this two days in the stock market do not fall, our grading arbitrage called " bare Set", you are shirtless, There is no risk-prevention capability.Hedging arbitrage .If you want to play a premium arbitrage, you can buy a certain rating A and grade B first, and then hold, when the Grade A and grade B in the two-tier market appear the more obvious overall p

1: Object Oriented thinkingObject-oriented is a process-oriented programming idea.Process oriented: Emphasis on the steps of each of these functionsObject-oriented: emphasizes the object and then invokes the function by the object2: Object-oriented thinking featuresA: It's a thought that's more in line with our thinking habits.B: Complex things can be simplifiedC: Turning us from the executor to the conductorExample:Buy a computer:Process-oriented: My understanding of the computer--understand my

Puzzlestime limit:1000msmemory limit:262144kbthis problem'll be judged onCodeforces. Original id:337a64-bit integer IO format: %i64d Java class name: (any) The end of the school year was near and Ms Manana, the teacher, would soon has to say goodbye to a yet another class. She decided to prepare a goodbye present n students and give each of them a jigsaw puzzle (which, as Wikipedia states, was a tiling puzzle that require s the assembly of numerous small, often oddly shaped, interlocking and te

Test instructionsN (10^5) guests come to the store to give the time and the price of the goods to the salesperson every W minutes to sleep if the guest comes when she wakes her up when she sleeps but does not buy things to buy things the number of guests to purchase is 1, 2, 3, 1, 2, 3 ... The average price of the thing to sell when the loop asks how big is WIdeas:It is easy to think of the time that the guests are pressed and then calculate their interval w must be one of those intervals, that

Original Address:Introduction to the stock indexPeach Silk1, the operation of Bdzx Star command is clear.PAV Chip GravityThe 1.PAV Upper Rail (GV) and Lower Rail (CV) vibrate within 0 to 100 and 100 to 0 respectively;2.pav-diff at a high level of large shocks indicate the main position suction;3.pav-diff in the low holding constant indicates the main earthquake bin washing disk;4.pav-diff from the low start to show the start of the big market launch;5.pav-diff Band Volume Down indicates the end

request actions for another user should belong to another session, and they should not be confused. For example, any item that user a buys in a supermarket should be placed in A's shopping cart, regardless of when user a buys it, it belongs to the same session and cannot be placed in User B or User C's shopping cart, which is not part of the same session.but a Web application transmits data using the HTTP

Session tracking is a common technique used in Web programs to track a user's entire session . Common session tracking techniques are cookies and sessions. The cookie determines the user's identity by logging information on the client , and thesession determines the user's identity by logging information on the server side .1.1 Cookie MechanismIn the program, session tracking is a very important thing. Theoretically, all request actions for one user should belong to the same session , and all

tracking is a very important thing. Theoretically, all request actions for one user should belong to the same session, and all request actions for another user should belong to another session, and they should not be confused. For example, any item that user a buys in a supermarket should be placed in A's shopping cart, regardless of when user a buys it, it belongs to the same session and cannot be placed

For example, user A spent two yuan to buy 100 bottles of water today. The market price is now 2 fast money, and then submit A ticket: when the market price rises to 2.5 yuan, he will sell 100 bottles. A is just waiting for A person to buy B User: now the market is assumed to be 3 yuan; then the order of 2.5 yuan to buy 50 bottles. Question: How does PHP use queue to enable automatic purchase of B users? User A spent two yuan today to buy 100 bottles of water; the market is now two quick mone

Title: 11054-wine Trading in GergoviaThe owner of each house either buys the wine or sells the wine, and the number of the wines they buy and sell is the same. Liquor-making people need to transport wine to the home of the person who buys the wine, and every bottle of wine transported to the adjoining house costs a unit of money, asking how to make the overall shipping cost the least.Problem-solving ideas:

array every time (the element that starts with this array must be the coordinates of the leftmost person who buys the wine), if the item in front of the array is 0, we move the start coordinate to the right (without this step, it will definitely time out).but just now on the internet to see another one way to do this is not to consider the purchase and sale relationship stipulated in the topic, and to stipulate that the first person

Say you has an array for which the i-th element is the price of a given-stock on day I.Design an algorithm to find the maximum profit. You are in most of the transactions.Note:Engage in multiple transactions on the same time (ie, you must sell the stock before you buy again).Thought: My brain is more stupid, the idea is more unpopular, and high efficiency.The maximum time complexity is O (n^2), the minimum is O (n), is not fixed, and the space complexity is O (n). Why the complexity of time is

, stay with grandchildren night reading.The book has its own thousand Zhong, the book has its own Yanruyu.Do not blame the days to blame people, the five Elements of life generation.Do not complain that he is poor, that he is poor, that he is poor, that he is rich, and that he is rich.I ride a donkey on horseback, I think I'm better,When I look back, I still have a leg to pick.There are starving people on the road, there are leftovers in the house.Jide and grandchildren, to wide-line convenience

generated by MRP. Now our process starts with a manual new purchase requisition. In this step, the planning Department of the company will manually fill in the purchase requisition and apply for the purchase of a batch of raw materials and trade goods. In the project overview, enter information on the item, quantity, delivery date and delivery factory requested for purchase Ch4.37 New Purchase Order Quote: According to the Plan department's purchase requisition, the pu

that the price of rabbit's nest was too high because some rabbits had to resell themselves after they had bought the rabbit's nest.Therefore, the wolf rule: if a rabbit buys a rabbit nest and sells it within five years, he must pay the business tax to the wolf.As a result, the price of the rabbit nest did not drop, but the Wolf made a fortune.The wolf said to the Fox: He only lent money to the rabbit who first paid more money, and raised the interest

Recently, Buffett published an annual "a letter to shareholders", which reiterated the "secret" of making his successful investment. This newspaper excerpted this article to serve readers. 1. Maintain sufficient liquidity. He wrote that we will never rely on strangers for good intentions. Our arrangements for our own affairs will surely make any cash requirements that we are very likely to face insignificant in the face of our mobility; in addition, this kind of liquidity will be constantly ref

How can I dynamically listen for database changes? I want to make a shopping website and want to prompt the message "someone bought your product" when someone buys the product, but how can I listen for database changes? Should the regular query database occupy a lot of resources? (1 time per second ). Thank you! ------ solution ------------------ I understand what the landlord means. he means how to dynamically listen to database changes when someone

When you were 1 year old, she fed you milk and bathed you; and in return, you cried all night; When you are 3 years old, she cooks food for you with pity. In return, you throw a dish of food she cooks to the ground; When you were 4 years old, she bought you a color pen. In return, you painted an abstract painting full of walls; When you are 5 years old, she buys you beautiful clothes. In return, you wear it to the mud pit to play; When you w