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#include <iostream>
#include <cmath>
#include <vector>
#include <array>
using namespace std;

namespace my {
	template <typename T>  void printArray(array<T, 20> a)
	{
		for (auto it : a)
			cout << it << " ";
	}
}


int main()
{
	array <int, 20> arr={ 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18 };
	my::printArray(arr);
}