View problem - UFO (IZhO14_ufo) :: oj.uz

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

Time limit	Memory limit	# of submissions	# of submitted users	Solved #	Accepted user ratio
2000 ms	256 MiB	346	68	45	66.18%

You must use stdin/stdout as input/output files instead of ufo.in/ufo.out.

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Problem Source

IZhO 2014 Day 2 Problem D