#pragma once
#include<iostream>
using namespace std;
template <typename T>
class Statistics {
private:
    int n = 0;
    T max_value = -501;
    T min_value = 501;
    T average_value;
    T positive_count;
    T negative_count;
    T odd_sum;
    T even_sum;
    T first_elem;
    T last_elem;
public:

     void operator() (const T& value) {
         if (n == 0) {
             first = value;
         }
         ++n;
         if (value > max_value) {
             max_value = value; //task a
         }


         if (value < min_value) {
             min_value = value; //task b
         }
         average = ((average * (n - 1)) + x) / n; // task c


         if(value % 2 == 0 ) {
             even_sum+=value;  // task g
         } else {
            odd_sum+=value; // task f
         }

         if (value > 0) {
             ++positive_count; // task d
         } else if(value < 0 ) {
             ++negative_count; // task e
         }
     }
    void ShowStatistics() {
        cout << "even sum : " << even_sum << endl;
        cout << "even sum : " <<odd_sum << endl;

        cout << "positive count : " <<positive_count << endl;
        cout << "negative count  : " << odd_sum << endl;
    }




};