#include <iostream>
#include <cstdlib>
#include <string>
using namespace std;

int main()
{
	const size_t students {5};
	const size_t subjects {5};
	double grades [students][subjects];

	for (int i {0}; i < students; ++i){
		cout << "Enter grades for student " << i + 1 << ":\n";
		for (int j {0}; j < subjects; ++j){
			cout << " Subject " << j + 1 << ": ";
			cin >> grades[i][j];
			if (!cin){
				cerr << "Sorry, that cant be an input.\n";
				return EXIT_FAILURE;
			}
		}
	}
	for (int i {0}; i < students; ++i){
		double sum {0};
		for (int j {0}; j < subjects; ++j){
			sum += grades[i][j];
		}
		double average {sum / subjects};
		cout << "Average for student " << i + 1 << ": " << average << "\n";
	}
	for (int j {0}; j < subjects; ++j){
		double sum {0};
		for (int i {0}; i < students; ++i){
			sum += grades[i][j];
		}
		double average {sum / students};
		cout << "Average for subject " << j + 1 << ": " << average << "\n";
	}
	double highest {grades[0][0]};
	double lowest {grades[0][0]};
	
	for (int i {0}; i < students; ++i){
		for (int j {0}; j < subjects; ++j){
			if (grades[i][j] > highest){
				highest = grades[i][j];
			}
			if (grades[i][j] < lowest){
				lowest = grades[i][j];
			}
		}
	}
	cout << "Higest grade: " << highest << "\n";
	cout << "Lowest grade: " << lowest << "\n";

	return EXIT_SUCCESS;
}