#include <iostream>
using namespace std;

int main(){

	int students, classes;
	double spc; //students per class

	cout <<"give number of students"<<endl;
	cin>> students;
	cout <<"give number of classes"<<endl;
	cin>> classes;

	if (classes<=0){
		cerr<<"Students and no valid classes" <<endl <<"Number of classes must be positive" <<endl;
		exit(1);
		}

	if (students <=0){
		cerr<<"No valid student number" <<endl <<"Number of students must be positive"<<endl;
		exit(1);
		}

	spc=students/(1.0*classes);

	cout << students <<"Students" <<endl <<classes <<" classes" << endl << "Average of studnets per class:" <<spc <<endl;

	


return 0;

}