new file:   BestCoder/Round#1/A.cc
	new file:   BestCoder/Round#1/B.cc
	new file:   BestCoder/Round#1/B_sqrt.cc
	new file:   BestCoder/Round#2/A.cc
	new file:   BestCoder/Round#2/B.cc
	new file:   BestCoder/Round#2/C.cc
	new file:   BestCoder/Round#2/D.cc