#include <iostream>
#include <iterator>
#include <vector>
using namespace std;

int main()
{
    int a[5];
    int b[] = {1,2,3};
    vector<int> v{3,4,5,6};

    cout << size(a) << endl;
    cout << size(b) << endl;
    cout << size(v) << endl;
}