摘要：
Let SS be a sequence of integers s_{1}s1, s_{2}s2, ......, s_{n}snEach integer is is associated with a weight by the followin... 阅读全文
摘要：
There are nn rectangles on the plane. The problem is to find the area of the union of these rectangles. Note that these rectangles mig... 阅读全文
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In this problem, we will define a graph called star graph, and the question is to find the minimum distance between two given nodes in... 阅读全文
摘要：
You are given a list of train stations, say from the station 11 to the station 100100.The passengers can order several tickets from on... 阅读全文