说明：  浙大 编程能力测试 的甲级题目 第 1012. The Best Rank (25) 最人性的成绩排序
(To uate the performance of our first year CS majored students, we consider their grades of three courses only: C- C Programming Language, M- Mathematics (Calculus or Linear Algebra), and E- English. At the mean time, we encourage students by emphasizing on their best ranks that is, among the four ranks with respect to the three courses and the average grade, we print the best rank for each student.)