template<typename T>
ostream& operator<<(ostream &out,vector<T> &v){
    for(const auto &ele:v){
        out<<ele<<" ";
    }
    return out;
}

template<typename T>
ostream& operator<<(ostream &out,T x){
    out<<x<<" ";
    return out;
}

error: ambiguous overload for 'operator<<' (operand types are 'std::basic_ostream' and 'const char [2]')