#include <iostream.h>
#include <iomanip.h>
#include <fstream.h>
#include <apvector.h>
#include <math.h>

void main (void) {
	ifstream infile ("numbers.txt",ios::in);
	apvector<int> letters(0);
	apvector<int> number(101,0);
	int x;
	long total = 0;

	while (infile >> x) {
		letters.resize(letters.length()+1);
		letters[letters.length()-1] = x;
		total += x;
		number[x]++;
	}

	double avg = total/double(letters.length());

	int mode = 0;
	for (int b = 0;b < number.length();b++) if (number[b] > number[mode]) mode = b;

	 
	double standardDeviation,y,total2 = 0;
	for(int a = 0;a < letters.length();a++) {
		y = avg - letters[a];
		if (y < 0) y *= -1;
		total2 += y;
	}
	standardDeviation = sqrt(total2 / (letters.length()-1));

	cout << "The average of the numbers - " << avg << "\n\nThe Mode - " << mode << "\n\nThe Standard Deviation - " << standardDeviation << "\n\n";
}