#include <iostream>
#include <iomanip>
#include <fstream>
using namespace std;

int main () {
    ifstream in ("data.txt");
    int i = 0, ranges [11] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
    double item, sum = 0, vsum = 0, min = 11, max = 0;
    for (;;) {
        if(in >> item) ++i; else break;
        sum += item;
        vsum += item * item;
        if (item < min) min = item;
        if (item > max) max = item;
        ++ranges[(int)item];
    }
    vsum -= sum * sum / i;
    
    cout << setprecision(15);
    cout << "Mean of the values is:       " << sum / i << endl
         << "Variance of the values is:   " << vsum / i << endl
         << "Maximum of the values is:    " << max << endl
         << "Minimum of the values is:    " << min << endl << endl;
    for (int c = 0; c < 11; ++c)
        cout << "Number of values in interval [" << setw(2) << c << ", "
             << setw(2) << (c+1) << "):   " << ranges[c] << endl;
        
    system("pause");
    return 0;
}