// -*- mode: c++ -*-
// $Id
// http://www.bagley.org/~doug/shootout/
// Calculate statistical moments of a region, from Bill Lear
// [dada] 2001-09-19 had to change power to pow for VC++

#include <iostream>
#include <vector>
#include <numeric>
#include <iterator>
#include <algorithm>
#include <cstdio>
#include <math.h>

using namespace std;

template <class T>
struct moments {
public:
    template <class InputIterator>
    moments(InputIterator begin, InputIterator end)
        : median(0.0), mean(0.0), average_deviation(0.0),
          standard_deviation(0.0), variance(0.0),
          skew(0.0), kurtosis(0.0)
    {
        T sum = accumulate(begin, end, 0.0);
        size_t N = end - begin;
        mean = sum / N;

        for (InputIterator i = begin; i != end; ++i) {
            T deviation = *i - mean;
            average_deviation += fabs(deviation);
            variance += pow(deviation, 2);
            skew += pow(deviation, 3);
            kurtosis += pow(deviation, 4);
        }

        average_deviation /= N;
        variance /= (N - 1);
        standard_deviation = sqrt(variance);

        if (variance) {
            skew /= (N * variance * standard_deviation);
            kurtosis = kurtosis/(N * variance * variance) - 3.0;
        }

        sort(begin, end);
        size_t mid = N/2;
        median = N % 2 ? *(begin+mid) : (*(begin+mid) + *(begin+mid-1))/2;
    }

    T median;
    T mean;
    T average_deviation;
    T standard_deviation;
    T variance;
    T skew;
    T kurtosis;
};

int main() {
    vector<double> v;
    char line[8];

    ios_base::sync_with_stdio(false);
    cin.tie(0);

    while (cin.getline(line, 8)) {
        v.push_back(atof(line));
    }

    moments<double> m(v.begin(), v.end());

    int n = v.end() - v.begin();

    printf("n:                  %d\n", n);
    printf("median:             %f\n", m.median);
    printf("mean:               %f\n", m.mean);
    printf("average_deviation:  %f\n", m.average_deviation);
    printf("standard_deviation: %f\n", m.standard_deviation);
    printf("variance:           %f\n", m.variance);
    printf("skew:               %f\n", m.skew);
    printf("kurtosis:           %f\n", m.kurtosis);
}