View problem - Double Attendance (CCO22_day1problem3)

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

Time limit	Memory limit	# of submissions	# of submitted users	Solved #	Accepted user ratio
3000 ms	1024 MiB	18	7	4	57.14%

Problem Source

Double Attendance Batch Compilation commands