Closed ignis-siu6i closed 8 months ago
https://onlinejudge.org/index.php?option=onlinejudge&Itemid=8&page=show_problem&problem=382
done by #21 그리고 그 앞의 몇몇 commit들
https://onlinejudge.org/index.php?option=onlinejudge&Itemid=8&page=show_problem&problem=382