Systems

Hardware

Teams will be provided with ThinkPad L580s, featuring 15 inch displays and keyboards with a German QWERTZ layout. Additonally, we will provide a mouse and mousepad.

As stated in the rules, teams are allowed to bring one USB keyboard to replace the keyboard provided by us. Note that keyboards with pre-programmed macro keys are not allowed. Wireless keyboards are also not allowed. The provided mouse may not be replaced by the team.

Software

We will be using a slightly modified version of the latest ICPC World Finals Contest OS image. So the selection of editors, IDEs and programming languages will be very similar to what was avaialble at the last World Finals.

The operating system and desktop environment used will be Ubuntu 24.04.3 LTS and Xfce 4.18.

Programming Languages

The following programming languages will be available:

• C++ (GCC 13.3.0), compiled with g++ -x c++ -std=gnu++20 -Wall -O2 -static -pipe -DONLINE_JUDGE -DDOMJUDGE -o "$DEST" "$@"
• C (GCC 13.3.0), compiled with gcc -x c -std=gnu11 -Wall -O2 -static -pipe -DONLINE_JUDGE -DDOMJUDGE -o "$DEST" "$@" -lm
• Java (OpenJDK 21.0.8), compiled with javac -encoding UTF-8 -sourcepath . -d . "$@" and executed with java -Dfile.encoding=UTF-8 -DONLINE_JUDGE -DDOMJUDGE -XX:+UseSerialGC -Xss65536k -Xms1966080k -Xmx1966080k '$MAINCLASS' "$@"
• Python 3 (3.9.18) with PyPy (7.3.15), compiled with pypy3 -m py_compile "$@" and executed with export ONLINE_JUDGE=1 DOMJUDGE=1; pypy3 "${MAINSOURCE}" "$@"
• Kotlin (kotlinc-jvm 1.9.24), compiled with kotlinc -d . "$@" and executed with kotlin -Dfile.encoding=UTF-8 -DONLINE_JUDGE -DDOMJUDGE -XX:+UseSerialGC -Xss65536k -Xms1966080k -Xmx1966080k '$MAINCLASS' "$@"

For your convenience, the following aliases will be available in your .bash_aliases:

• alias myg++='g++ -x c++ -std=gnu++20 -Wall -O2 -static -pipe -g'
• alias judgeg++='g++ -x c++ -std=gnu++20 -Wall -O2 -static -pipe -DONLINE_JUDGE -DDOMJUDGE'
• alias mygcc='gcc -x c -std=gnu11 -Wall -O2 -static -pipe -g -lm'
• alias judgegcc='gcc -x c -std=gnu11 -Wall -O2 -static -pipe -DONLINE_JUDGE -DDOMJUDGE -lm'
• alias myjavac='javac -encoding UTF-8 -sourcepath . -d .'
• alias judgejavac='javac -encoding UTF-8 -sourcepath . -d .'
• alias myjava='java -Dfile.encoding=UTF-8 -XX:+UseSerialGC -Xss65536k -Xms1966080k -Xmx1966080k'
• alias judgejava='java -Dfile.encoding=UTF-8 -DONLINE_JUDGE -DDOMJUDGE -XX:+UseSerialGC -Xss65536k -Xms1966080k -Xmx1966080k'
• alias mykotlinc='kotlinc -d .'
• alias judgekotlinc='kotlinc -d .'
• alias mykotlin='kotlin -Dfile.encoding=UTF-8 -XX:+UseSerialGC -Xss65536k -Xms1966080k -Xmx1966080k'
• alias judgekotlin='kotlin -Dfile.encoding=UTF-8 -DONLINE_JUDGE -DDOMJUDGE -XX:+UseSerialGC -Xss65536k -Xms1966080k -Xmx1966080k'
• alias mypython3='pypy3'
• alias judgepython3='env ONLINE_JUDGE=1 DOMJUDGE=1 pypy3'
• alias mypypy3='pypy3'
• alias judgepypy3='env ONLINE_JUDGE=1 DOMJUDGE=1 pypy3'

Limits

Execution as described above will take place in a sandbox. The sandbox will allocate 2 GiB of memory; the entire program, including its runtime environment, must execute within this memory limit. For interpreted languages (Java and Python) the runtime environment includes the interpreter.

The sandbox memory allocation size will be the same for all languages and all contest problems. For Java and Kotlin, the command above shows the stack size and heap size settings which will be used when the program is run in the sandbox. For C, C++, and Python, the stack and heap sizes are limited only by the total amount of memory available in the sandbox.