A.
The Perfect Collection Given an array A of N integers, if we choose any K of these integers and calculate their bitwise XOR... |
B.
Alice and the Chessboard It's Sunday afternoon, and Alice is in her room trying to figure out the rules of the game called Ch... |
C.
Darth Vader and 3PO on a Tree! Did you watch Star Wars yet? No? You should in your free time. Now back to Darth Vader and 3PO. Dart... |
D.
Old Magic! You: Guess an integer number, but don't tell me. Your friend: Okay! You: Now multiply it by 3. Your ... |