#include <iostream>
#include <cmath>
using namespace std;
#pragma once

namespace task1 {

	int F(int num);  // num table
	int a(int* m, int size);
	int b(int* m, int size);
	int v(int* m, int size);
	int g(int* m, int size);
	int d(int* m, int size);
	int e(int* m, int size);

	int init()
	{
		cout << "TASK #1" << endl;
		setlocale(LC_ALL, "Russian");
		int n;
		cout << "Введите длину: "; cin >> n;

		int* m = new int[n];
		cout << "Введите элементы: " << endl;
		for (int i = 0; i < n; i++) { cin >> m[i]; }

		cout << "а) " << a(m, n) << endl;
		cout << "б) " << b(m, n) << endl;
		cout << "в) " << v(m, n) << endl;
		cout << "г) " << g(m, n) << endl;
		cout << "д) " << d(m, n) << endl;
		cout << "е) " << e(m, n) << endl;

		delete[] m;
		return 0;
	}

	int F(int num)
	{
		int n = 1;
		for (int i = 1; i <= num; i++)
		{
			n *= i;
		}
		return n;
	}

	int a(int* m, int size)
	{
		int n = 0;
		for (int i = 0; i < size; i++)
		{
			int num = m[i];
			if (num % 2 != 0)
			{
				n++;
			}
		}
		return n;
	}

	int b(int* m, int size)
	{
		int n = 0;
		for (int i = 0; i < size; i++)
		{
			int num = m[i];
			int sqrt_num = sqrt(num);

			if ((sqrt_num * sqrt_num) == num && (num % 2 == 0))
			{
				n++;
			}
		}
		return n;
	}

	int v(int* m, int size)
	{
		int n = 0;
		for (int i = 0; i < size; i++)
		{
			int num = m[i];
			if (num % 3 == 0 && num % 5 != 0)
			{
				n++;
			}
		}
		return n;
	}

	int g(int* m, int size)
	{
		int n = 0;
		for (int i = 0; i < size; i++)
		{
			int k = i + 1;
			int num = m[i];
			if ((pow(2, k) < num) && (num < F(k)))
			{
				n++;
			}
		}
		return n;
	}

	int d(int* m, int size)
	{
		int n = 0;
		for (int i = 0; i < size; i++)
		{
			int k = i + 1;
			int num = m[i];
			if (i - 1 >= 0 && i + 1 < size && num < ((m[i - 1] + m[i + 1]) / 2))
			{
				n++;
			}
		}
		return n;
	}

	int e(int* m, int size)
	{
		int n = 0;
		for (int i = 0; i < size; i++)
		{
			int num = m[i];
			if (i % 2 == 0 && num % 2 != 0)
			{
				n++;
			}
		}
		return n;
	}
}