Solved by rkdvnfma90

#	Title	# Solved	Avg. Tries
10930	SHA-256 STANDARD	1,965	1.34
5397	Keylogger	13,035	3.60
4195	Virtual Friends	9,158	3.71
3460	Binary numbers	9,312	1.82
2920	NOTE	54,120	1.74
2798	JACK	75,379	2.04
2501	약수 구하기	33,788	2.00
1966	Printer Queue	38,786	1.70
1920	수 찾기	60,430	3.29
1260	DFS와 BFS STANDARD	71,674	2.62

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