번호	제목
27653	최소 트리 분할
27654	시험
27655	점프
27656	양궁
27657	정렬
27658	GCD와 K번째 쿼리
27659	Queue skipping (Easy)
27660	Queue skipping (Hard)
27661	Counting swaps (Easy)
27662	Russian roulette (Hard)
27663	Counting swaps (Hard)
27664	Ferries (Easy)
27665	Ferries (Hard)
27666	Greatest number (Easy)
27667	Greatest number (Hard)
27668	Kill switch (Easy)
27669	Kill switch (Hard)
27670	Turning gears (Easy)
27671	Turning gears (Hard)
27672	Ultimate magic rectangles (Easy)