da li je vektor oscilatoran

#include <iostream>
#include <vector>

bool Oscilatoran(std::vector<double> v)
{
    for (unsigned int i(1); i < v.size()-1; i++)
    {
        if((v.at(i) > v.at(i+1) && v.at(i) < v.at(i-1)) || (v.at(i) < v.at(i+1) && v.at(i) > v.at(i-1)))
            return false;
    }
    return true;
}

int main()
{
    std::vector<double> v1{3, 7, 4, 6, 1, 5, 2, 3};
    std::vector<double> v2{3, 1, 5, 4, 7, 2, 3, 2};
    std::cout << Oscilatoran(v1) << std::endl << Oscilatoran(v2);
    return 0;
}