1.Red Black Tree
Case 1: Black Red(This red should be considered whether parent is red, then keep analysizing case 1 or 2 or 3.)
Red Red → Black Black
Black Red(New) Black Red
Case 2: Black Black
Red! Black → Red(New) Black
Black Red(New) Red!
Black
Case 3: Black# Black(New)
Red(New) Black → Red! Red#
Red! Black Black
Black
2.Python-%s%d Input
%s or %d %(str,int)
Python- and or
and has higher priority than or