Consider the data type `Elev`, defined as follows: ``` struct Elev { char nume[40]; int g[4]; int ng; double medie; }; ``` where `nume` is the student name, `g` is the grades array, `ng` is the number of grades (the same for all students), and `medie` is the arithmetic mean of the grades. Read from standard input three natural numbers `n`, `k`, and `m`, representing the number of students, how many students to include in the ranking, and how many grades each student has. The data for `n` students follows (name and `m` grades). Compute the arithmetic mean for each student, then print the top `k` students in descending order of their average. If two students have the same average, the one whose name is lexicographically smaller (compare with `strcmp`) is printed first. If `k > n`, print all `n` students. The average is printed with exactly two decimal places.