User Manual for IOI 2002 Yong
Contents
1. AL For the output only tasks the syntax will be F ILE taskname data See the task overviews and task descriptions for detail 2002 08 01 17 12 Page 1 of 3 Instructions O O S IOI 2002 Yong In niemalional Ghri on hiru Baa T aaa a Range of integer variable The ordinary type integer in freepascal has the range of 32768 to 32767 In some tasks this may not be enough Use 32bit variant longint type which has the range of 2147483648 to 2147483647 Exit value For C and C programmers make sure that your program terminates with exit Q or return O in main Exiting with any other value is considered as an incorrect termination A normally terminated Pascal program returns a O when it terminates Differences between Linux and Windows XP A program submitted for grading or testing will be compiled using the options given in the overview sheet The compiled program will be executed on Linux Running programs on a Linux machine differs slightly from running programs on a Windows machine If you access a pointer variable that points the memory outside your allocation your program may stop abnormally If you access outside the boundary of an array your program may stop abnormally Linux does not initialize local variables to any predictable value These differences mean that your program might work fine on Windows XP and fail on Linux Be careful when using pointers arrays and uninitialized variabl2. Instructions O O s IOI 2002 Yong In Iriemational Chapa on Indies Korea YONG IN KOREA User Manual User Manual for IOI 2002 Yong In Korea GENERAL Contestant materials Contestants will get the competition materials in the competition envelope The envelope will contain a sheet for a user id and password for the web services You need them to access the services Selecting operating system You can select Linux or Windows XP at booting Competition computers are configured for dual booting Use the cursor key to highlight your choice and type Enter key Login You do not need to login to Windows XP You can login to Linux with username 101 password ioi Restarting your computer In Windows XP click Start and Turn off computer From the menu that appears choose Restart In Linux you may press Ctrl Alt Fl to change console mode You can return to X Windows mode by pressing Ctrl Alt F7 Then you may press Ctrl Alt Del to restart If you need help If you need any assistance system trouble go to toilet whatever please just raise your hand and wait for help PROGRAMMING Comment tags for grading Your program or output file for output only tasks must have certain tags in comments for the grading system to identify the task and the programming languages for source code file For the source code submission the syntax will be TASK Taskname LANG LANGUAGE where LANGUAGE is one of C C or PASC
3. disqualified from the competition Submitted programs are not allowed to access the network are not allowed to fork are not allowed to read or create files directly are not allowed to attack the system security or the grader are not allowed to attempt to execute other programs are not allowed to change file system permissions and are not allowed to read file system information A contestant whose program attempts any of the above will be disqualified 2002 08 01 17 12 Page 3 of 3
4. es to avoid these problems TROUBLES There are some inconveniences for programming in the competition environment You can avoid these problems RHIDE and debugging problem in Windows XP Trouble If you set breakpoints and the program terminates without reaching any of the breakpoints the DOS box will be terminated without even a message Solution Set any breakpoints on the first or last line to reach in any case RHIDE and black screen in Windows XP Trouble If you launch RHIDE in full screen mode and you choose DOS shell or execute the program or exit RHIDE you may see only a black screen Solution Change to the window mode by pressing Alt Enter You may avoid this problem by launching RHIDE with S option 2002 08 01 17 12 Page 2 of 3 Instructions O O S IOI 2002 j Yong In niemalional Cy rupee on hirus Manual Freepascal IDE in Linux Trouble The function of viewing user screen in FP IDE has some trouble It breaks the IDE editing screen Solution Returning of editing mode makes the screen clean again You may avoid this problem by using console compilation and debugging FORBIDDEN A contestant trying to interfere with other contestants activities trying to break the installations or evaluation facilities trying to harmfully interfere with the running of the competition in any way or trying to communicate in any way during a competition round with anyone other than the competition staff will be
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