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原题下载 USACO2014-DEC-S2 答案 (Analysis by Nick Wu) Let's define f(n,k)f(n,k) to be the smallest distance needed to end up at point nn having skipped exactly kk points. Given that we are at a spec...
原题下载 USACO2014-DEC-G3 答案 (Analysis by Mark Gordon) Two cows must be in different lanes if one cow overtakes the other at some point (or at the very end) in the jog. Viewed this way we can gre...
原题下载 USACO2014-DEC-G2 答案 (Analysis by Allen Chen) Seeing that we have to update point coordinates and query the minimum travel time for a sub-route, we immediately see that this problem invol...
原题下载 USACO2014-DEC-G1 答案 (Analysis by Bill Cooperman) An initial observation for many experienced contestants is that there can be no more than 20 cows. Immediately this suggests some solutio...
原题下载 USACO2014-DEC-S3 答案 (Analysis by Jonathan Paulson - jonathanpaulson@gmail.com) If the cows didn't have to slow down, after TT seconds cow ii will be at position xi+T∗sixi+T∗si. If a fast...
答案 (Analysis by Jonathan Paulson - jonathanpaulson@gmail.com) The first step is to see that we can break Bessie and Elsie's trip into two parts: the start until they meet and piggyback, and then ...
原题下载 USACO2014-DEC-B3 答案 (Analysis by Jonathan Paulson - jonathanpaulson@gmail.com) If a faster cow is behind a slower cow, the faster cow is eventually going to catch up and join the slower ...
原题下载 USACO2014DEC-B2 答案 (Analysis by Jonathan Paulson - jonathanpaulson@gmail.com) We can go along the squares in top-to-bottom, left-to-right order. For each square, we want to see if it sta...
原题下载 USACO2014-DEC-B1 答案 (Analysis by Nick Wu) Our first instinct when trying to figure out which point to skip is to try all of them. If we choose to skip each point and compute the new dist...
想必考了10月SAT考试的大部分同学都收到了自己这次SAT的成绩单，无论考得如何，无论你接下来是直接准备提前录取，还是准备继续征战SAT，一切都会是新的开始。阅读和数学的成绩无论好坏或许还在大家的预料之中，这...
爱德思在中国市场的发展2017年爱德思在中国的中心总数为185个。在增加考试中心的同时，爱德思考试局也相当重视学校的资质和可提供的资源。 中国考生目前在学学生数为13075人，达到历史最高值，有50314人次参加IG/...
Hello，大家好，因为原始版本的sat2数学答案有诸多问题，我现在进行了初稿的订正，分享给大家。不过是人就会犯错误，如果哪里错了，大家也可以告诉我，我会在后面订正修改。非常感谢。 答案下载链接（PC端打开）...
