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Harry Potter's exam (an application of Dijkstra algorithm)

In our SOR McGonagall's class of transfiguration, Harry Potter is learning how To transform one object into another by some spells. He has learned that, to turn a catInto a mouse one can say docamo! To reverse the effect, simply say decamo!Formally

Using DBI to connect to a Microsoft SQL Server

Using DBI to connect to a Microsoft SQL server is a relatively simple task. Rather than go with a simple example, I have chosen to demonstrate not just connectivity, but also error checking.As always, when you want to use a module, you must declare

Script queries the number of records of each table in the SQL database

Declare @ tbName nvarchar (500) declare @ ct int declare @ csql nvarchar (500) declare # tb cursor for SELECT OBJECT_NAME (id) as TableName FROM sysobjects WHERE xtype = 'U' and objectproperty (id, 'ismsshipped ') = 0 open # tb fetch next from # tb

Format/printf)

For Python string formatting, use "character % format 1% Format 2 characters" % (variable 1, variable 2), and % format to accept the type of the variable. A simple example is as follows: # Example: String formatting name = '17jo 'print 'www. %

Hdu1209: Clock

Problem description There is an analog clock with two hands: An hour hand a minute hand. the two hands form an angle. the angle is measured as the smallest angle between the two hands. the angle between the two hands has a measure that is greater

Eight queens problem source code

# Include Static char quence [8] [8];Static int columms [8];Static int main_diagonal [15];Static int second_diagonal [15];Static int iquence_num = 0; Void solve_quence (int I, int num); // I indicates the rowVoid print (); Int main (){Int ROW = 0,

In-depth glance usage

1. Install glance Pak (the measureware tool included in glance Pak For performance analysis) Check whether glance Pak has been installed. Check the two license files/var/opt/perf/gkey and mwakey. We recommend that you back up these two files, you

Common SQL Server

  Code Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/--> -- Transactions Set   Transaction   Isolation   Level   Repeatable   Read Begin   Transaction --

Cf_467c_george and job

C. George and jobtime limit per test: 1 secondmemory limit per test: 256 megabytesinput: Standard InputOutput: standard output The new itone 6 has been released recently and George got really keen to buy it. unfortunately, he didn't have enough

Codeforces round #267 (Div. 2) C. George and job

The new itone 6 has been released recently and George got really keen to buy it. unfortunately, he didn't have enough money, so George was going to work as a programmer. now he faced the following problem at the work. Given a sequenceNIntegersP1 ,?P2

Poj 1988 cube stacking (and query set)

Cube stacking Time limit:2000 ms   Memory limit:30000 K Total submissions:14901   Accepted:5037 Case time limit:1000 ms Description Farmer John and Betsy are playing a game with N (1

Differences between ECHO and print

The ECHO and print functions in PHP are basically the same (output), but there are still slight differences between the two. 1. Return Value No return value after Echo output. Print has a return value. If the execution fails, flase is returned.

Codeforces round #272 (Div. 2)

Question: A. dreamoon and stairstime limit per test1 secondmemory limit per test256 megabytesinputstandard inputoutputstandard output Dreamoon wants to climb up a stairNSteps. He can climb 1 or 2 steps at each move. dreamoon wants the number of

Codeforces round #272 (Div. 1) A. dreamoon and sums (number theory)

Question Link Dreamoon loves summing up something for no reason. One day he obtains two integersAAndBOccasionally. He wants to calculate the sum of all nice integers. Positive IntegerXIs called nice if and, whereKIs some integer number in range [1,

It is said that it is Yahoo's PHP interview with answers

The interview questions collected from the Internet are said to be Yahoo. 1. Which of the following will not add John to the users array? 1. $ users [] = 'john '; 2. array_add ($ users, 'john'); // wrong 3. array_push ($ users, 'john '); 4. $ users |

Pressure DP entry

Question State compression Dynamic Planning (DP) is a dynamic planning that uses binary numbers to represent states. We often use 1 in binary to select the State represented by this bit, and 0 to indicate the opposite meaning. For example, if there

A maximum sum & North mail monthly competition question

Time Limit: 1000 ms Memory limit: 65536kb Description Given a set of N integers: A = {A1, A2,..., an}, we define a function D (A) as below: D (A) = sum {A [S1] ~ A [T1]} + sum {A [s2] ~ A [T2]} The rule is 1 Your task is to calculate d ().

Java Io stream knowledge Summary

Conclusion 1: General Usage principles of Java IO: 1. Classification by data source (destination: 1. File: fileinputstream, fileoutputstream, filereader, filewriter 2. byte []: bytearrayinputstream, bytearrayoutputstream 3. Char []: chararrayreader,

Codeforces round #193 (first two questions)

A. Down the hatch! Time limit per test 2 secondsMemory limit per test 256 megabytesInput Standard InputOutput Standard output Everybody knows that the berland citizens are keen on health, especially students. berland students are so tough that all

Codeforces round #193 (Div. 2) B. Maximum absurdity (DP and rmq solutions)

B. Maximum absurditytime limit per test 2 secondsMemory limit per test 256 megabytesInput Standard InputOutput Standard output Reforms continue entering berland. For example, during yesterday sitting the berland Parliament approved as muchNLaws

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