為什么這么多美國孩子是編程高手
當然,在美國,兒童學習計算機編程并不只是家長們或者官方政要... “編程能提高孩子邏輯思維能力”、“在信息學競賽上拿獎牌可以...
2010 USAMO Problems真題及答案 完整版真題免費下載 +答案解析請參考文末 Day 1 Problem 1 Let??be a convex pentagon inscribed in a semicircle of diameter?. Denote by?,?,?,??the feet of the perpendicular...
2011 USAMO Problems真題及答案 完整版真題免費下載 +答案解析請參考文末 Day 1 Problem 1 Let?,?,??be positive real numbers such that?. Prove that Problem 2 An integer is assigned to each vertex ...
2010 USAJMO Problems真題及答案 完整版真題免費下載 +答案解析請參考文末 Day 1 Problem 1 A permutation of the set of positive integers??is a sequence??such that each element of??appears precisely one ...
2011 USAJMO Problems真題及答案 完整版真題免費下載 +答案解析請參考文末 Day 1 Problem 1 Find, with proof, all positive integers??for which??is a perfect square. Problem 2 Let?,?,??be positive real nu...
2012 USAMO Problems真題及答案 完整版真題免費下載 +答案解析請參考文末 Day 1 Problem 1 Find all integers??such that among any??positive real numbers?,?,?,??withthere exist three that are the side len...
2013 USAMO Problems真題及答案 完整版真題免費下載 +答案解析請參考文末 Day 1 Problem 1 In triangle?, points??lie on sides??respectively. Let?,?,??denote the circumcircles of triangles?,?,?, respectiv...
2012 USAJMO Problems真題及答案 完整版真題免費下載 +答案解析請參考文末 Day 1 Problem 1 Given a triangle?, let??and??be points on segments??and?, respectively, such that?. Let??and??be distinct point...
2014 USAMO Problems真題及答案 完整版真題免費下載 +答案解析請參考文末 Day 1 Problem 1 Let??be real numbers such that??and all zeros??and??of the polynomial??are real. Find the smallest value the pro...
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