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http://lightoj.com/volume_showproblem.php?problem=1050 Your friend Jim has challenged you to a game. He has a bag containing red and blue marbles. The 阅读全文
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http://lightoj.com/volume_showproblem.php?problem=1071 All of you must have heard the name of Baker Vai. Yes, he rides a bike and likes to help people 阅读全文
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http://lightoj.com/volume_showproblem.php?problem=1064 n common cubic dice are thrown. What is the probability that the sum of all thrown dice is at l 阅读全文
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http://lightoj.com/volume_showproblem.php?problem=1051 1051 - Good or Bad PDF (English) Statistics Forum Time Limit: 2 second(s) Memory Limit: 32 MB A 阅读全文