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We all love recursion! Don't we? Consider a three-parameter recursive function w(a, b, c): if a <= 0 or b <= 0 or c <= 0, then w(a, b, c) returns: 1 i 阅读全文
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Fox Ciel is playing a mobile puzzle game called "Two Dots". The basic levels are played on a board of size n × m cells, like this: Each cell contains 阅读全文
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Problem Description The GeoSurvComp geologic survey company is responsible for detecting underground oil deposits. GeoSurvComp works with one large re 阅读全文
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题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=6286 Problem Description Given a,b,c,d,find out the number of pairs of integers (x,y) where a≤x≤b,c≤y≤d 阅读全文