Cannot enter while loop. Is it to do with using an unordered map?

I am trying to do a coding challenge where we have to shorten and minimise direction instructions. I am using an unordered map prior to implementing the while loop. The rest of the code works as expected but the while loop cannot be reached so I cannot output an appropriate value.

std::vector<std::string> dirReduc(std::vector <std::string>& arr)
{
    enum Direction
    {
        NORTH = 1, SOUTH = -1,
        EAST = 1, WEST = -1
    };
    int x=0, y=0;
    std::unordered_map<std::string, Direction> uMapDir = { {"North",NORTH},{"NORTH",NORTH},
                                                        {"South",SOUTH},{"SOUTH",SOUTH},
                                                        {"East",EAST},{"EAST",EAST},
                                                        {"West",WEST},{"WEST",WEST} };
    for (std::vector<std::string> ::const_iterator i =arr.begin(); i!=arr.end() ; i ++)
    {
        if ((*i=="North")||(*i == "NORTH")||(*i=="South")|| (*i == "SOUTH"))
        {
            y += uMapDir[*i];
        }
        else
        {
            x += uMapDir[*i];
        }
    }
    std::vector<std::string> outPutArr;
    while ((x!=0)&&(y!=0))
    {
        if (x<0)
        {
            x++;
            outPutArr.push_back("WEST");
        }
        else
        {
            x--;
            outPutArr.push_back("EAST");
        }

        if (y < 0)
        {
            y++;
            outPutArr.push_back("SOUTH");
        }
        else
        {
            y--;
            outPutArr.push_back("NORTH");
        }
    }
    return outPutArr;
}