Toppers Team

As the $MST$ (Mid Semester Test) are over and the results are also out. There are $N$ students in the class. You are given the marks of $N$ students where $a_i$ represents the marks of $i_{th}$ roll number student. The professor wants to make a team of size $k$. He will choose top $K$ students of the class in team. Your task is to print the roll number of student who will be selected in team. I