cpp vector for loop termination condition error

When compiling the below function, following is the compilation error. why is yt != endIx in the 2nd for loop illegal.

error C2678: binary '!=' : no operator found which takes a left-hand operand of type 'std::_Vector_iterator<std::_Vector_val<std::_Simple_types<int>>>' (or there is no acceptable conversion)


void printDebug(vector <int>  ar)
{
    for (auto it = ar.begin(); it != ar.end(); it++)
    {
        auto endIx = ar.end() - it;
        for (auto yt = ar.begin(); yt != endIx ; yt++)
        {
            cout << *it << " : " << endIx ;
        }
        cout << endl;
    }
}

Just to avoid confusion i have renamed the auto end iterator to endIx;