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...
2017AMC8真题答案详细解析请参考文末 ————————————————————————————————————————————— 翰林国际教育温馨提示：2019美国数学学术活动AMC8初一初二年级组比赛将于2019年11月13日举行，即日起—2019年10月20日，三到...
翰林国际教育第一时间为AMC8参赛选手提供2017年真题及完整答案，供各位估分参考。
Physics Bowl 美国高中物理学术活动由美国物理教师协会举办，该协会是美国唯一专注于普及与提升物理教育的学术机构。协会每年都会通过会议、论坛、杂志、学术活动等方式为美国大学与高中物理教育提供最新的物理前...
