摘要：Dijkstra, Dijkstra Dexter: “You don’t understand. I can’t walk... they’ve tied my shoelaces together.” Topper Harley: “A knot. Bastards!” Jim Abrahams 阅读全文

摘要：Jewel Magic Description I am a magician. I have a string of emeralds and pearls. I may insert new jewels in the string, or remove old ones. I may even 阅读全文

摘要：Fast Matrix Operations Description There is a matrix containing at most 106 elements divided into r rows and c columns. Each element has a location (x 阅读全文

摘要：K Smallest Sums Description You’re given k arrays, each array has k integers. There are k k ways to pick exactly one element in each array and calcula 阅读全文