/* Best Of The Mentors

At a certain school, the best mentor of students is determined by
which of the mentors has the students with the best GPAs. The purpose 
of this program is to first determine how many mentors there are, 
how many students each mentor mentors, calculate the average GPA of 
the students for each mentor, and determine the best of the mentors.

The average GPA should be rounded to two decimal places, and the best 
GPA should be displayed using %.2lf.

To make this problem easier, we will assume no mentor has the same 
average gpa for his students as another mentor (ie. no ties).

SAMPLE RUN:
Enter number of Mentors: 3
Enter number of students for Mentor 1: 3
Enter GPAs of the students for Mentor 1:
4 1.2 2.9
Enter number of students for Mentor 2: 4
Enter GPAs of the students for Mentor 2:
3.81 4.0 1.96 2.9
Enter number of students for Mentor 3: 4
Enter GPAs of the students for Mentor 3:
3.96 3.92 2.8 1.97

Mentor 2 is the best with an average GPA of 3.17.

*/

#include <stdlib.h>
#include <stdio.h>
#include <math.h>

int main(int argc, char *argv[])
{
	// Declare variables
	int numOfMentors, numOfStudents, bestMentor, i, j;
	double GPA, sumOfGPAs, avgGPA, bestAvgGPA = -1;
	
	// Get the number of classes at the school
	printf("Enter the number of Mentors: ");
	scanf("%d", &numOfMentors);
	
	// Iterate through the number of mentors gathering the 
	// GPA statistics for each of his/her students
	for(i=0; i<numOfMentors; i++) {
		// Get the number of students for current mentor
		printf("\nEnter the number of students for Mentor %d: ", i+1);
		scanf("%d", &numOfStudents);
		
		// Calculate the sum of the GPAs for current mentor
		sumOfGPAs = 0;
		printf("Enter the GPAs of his/her students:\n");
		for(j=0; j<numOfStudents; j++) {
			scanf("%lf", &GPA);
			sumOfGPAs += GPA;
		}
		
		// Calculate average GPA per mentor and determine if current mentor is the best
		avgGPA = round(sumOfGPAs/numOfStudents*100)/100;
		if(avgGPA > bestAvgGPA) {
			bestMentor = i+1;
			bestAvgGPA = avgGPA;
		}
	}
	
	// Print the best mentor and average GPA of that mentor's students
	printf("\nMentor %d is the best mentor with an average GPA of %.2lf.\n",
		   bestMentor, bestAvgGPA);
	
	return 0;
}