A  Judging Olympia
B  Hide That Number
C  Rotating Rings
D  A Tale from the Dark Side of The Moon
E  Fermat's Chirstmas Theorem
F  Incidental Points
G  Let's Go to the Movies
H  The Writer's Club
I  Moving Sticks
J  Johnny Hates Math

problems at the ACM ICPC Live Archive, numbers 4084-4093.

Resolvidos:

OK - A  Judging Olympia - nike
OK - B  Hide That Number - aritmético( 11 divide n, se (Si-Sp)%11 = 0 ) Si->soma dos digitos das posições impares. Sp->pares
OK - C  Rotating Rings - nike
OK - D  A Tale from the Dark Side of The Moon - manipulação de strings
OK - E  Fermat's Chirstmas Theorem - aritmético ( 2 = 1^2 + 1^2 )
OK - F  Incidental Points - geométrico
OK - G  Let's Go to the Movies - programação dinâmica
OK - H  The Writer's Club - BFS
OK - I  Moving Sticks - backtracking
OK - J  Johnny Hates Math - programação dinâmica