PATA PATA-1010 Radix PATA-1008 Elevator PATA-1009 Product of Polynomials PATA-1007 Maximum Subsequence Sum PATA-1006 Sign In and Sign Out PATA-1005 Spell It Right PATA-1004 Counting Leaves PATA-1003 Emergency PATA-1002 A+B for Polynomials PATA-1001 A+B Format