View problem - Lock Puzzle (innopolis2018_final_A)

Language	Compilation command
C11	/usr/bin/gcc -DEVAL -std=gnu11 -O2 -pipe -static -s -o A A.c -lm
C++20	/usr/bin/g++ -DEVAL -std=gnu++20 -O2 -pipe -static -s -o A A.cpp
C++17	/usr/bin/g++ -DEVAL -std=gnu++17 -O2 -pipe -static -s -o A A.cpp
Java	/usr/bin/javac -encoding UTF-8 A.java /bin/sh -c echo "Main-Class: A" > __manifest__.txt /bin/sh -c jar cfm A.jar __manifest__.txt *.class
Pypy 3	/usr/bin/pypy3 -m compileall -b A.py /bin/mv A.pyc __main__.pyc /usr/bin/zip A.pyz.zip __main__.pyc /bin/mv A.pyz.zip A.pyz

Time limit	Memory limit	# of submissions	# of submitted users	Solved #	Accepted user ratio
2000 ms	256 MiB	19	9	6	66.67%

Problem Source

Lock Puzzle Batch Compilation commands