OngSongMangSong is an open source online judge for ICPC-style problems.

옹송망송
부사 뒤숭숭하게 생각이 잘 떠오르지 않고 흐리멍덩한 모양. 출처
It is a condition or a situation that makes you feel vague, blurry, clear as mud.

When you just run into a problem, it might be easy, it might not. It might be so hard that you want to break your keyboard.
BUT if you go through the adversity, get an insight, and solve the problem, it makes you feel AWESOME.
I name this "OngSongMangSong" because at first everyone gonna feel it, but in the end everyone gonna solve it.

• Various User roles
• Submission Queue
• Scoreboard
• Ranking
• Achievements

• PHP 7.0 or later
• MySQL