add complexity comment 	modified:   matrix_chain_mutiply.hpp
add complexity comment
	modified:   matrix_chain_mutiply.hpp

opensourceDA/CLRS,opensourceDA/CLRS,tushar2708/CLRS,Mooophy/CLRS,tushar2708/CLRS,Mooophy/CLRS,Mooophy/CLRS,opensourceDA/CLRS,opensourceDA/CLRS,tushar2708/CLRS,Mooophy/CLRS,tushar2708/CLRS