gistfile1.cpp

    const hash_set::iterator begin = B.begin(), end = B.end();
    for (auto &a: A) {
        for (hash_set::iterator it = begin; it != end; ++it) {
            temp.first = a.first + it->first;
            size_t bucket = C._bucket(temp);
            auto it = C._find(temp, bucket);
            if (it == C.end()) {
                // Check it the load factor of C is too large.
                if ((double(C.size()) + 1) / C.bucket_count() > C.max_load_factor()) {
                    // Increase the size of the table.
                    container._increase_size();
                    // Recompute the bucker.
                    bucket = C._bucket(temp);
                }
                temp.second = a.second * it->second;
                C._unique_insert(temp, bucket);
                C._update_size(C.size() + 1u);
            } else {
                piranha::math::multiply_accumulate(it->second,a.second,it->second);
            }
        }
    }