template int reversed_binary_value() { vector v {binary...}; int size = v.size(); int sum{}; for(int i=0; i

Here is C++ Variadics problem solution - https://programmingoneonone.com/hackerrank-cpp-variadics-solution.html

Hours later, I still can understand how reversed_binary_value() function contributes towards getting the desired string output!!!!

I wonder if the author also understands what he wrote as a challenge.

Once I understood what it was all about I came up with this:

template <bool...digits>
int reversed_binary_value() {
    vector<bool> values{digits...};
    int sum = 0;
    for(int i{0};i < values.size(); ++i)
        sum += ((1&values[i])<<i);
    return sum;
}

By this practice and the following answers, now I remeber again some topics that for a while, I forgot them. Thanks everybody for the solutions.