8.3

#include <vector>
#include <ioastream>
using namespace std;

int max_elem(const vector<int> &a, const int &lenght)
{
    int max_elem = -100;
    for (int i = 0; i < lenght; i++)
    {
        if(a[i]> max_elem)
            max_elem = a[i];
    }
    return max_elem;
}

int main()
{
vector<int> array = { 6, 9,66,785,632,569,56,654,2,0, 31,23,33};

cout << max_elem(array, array.size())<< endl;
}