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  1. Prepare
  2. Data Structures
  3. Arrays
  4. Sparse Arrays
  5. Discussions

Sparse Arrays

  • nielgp93
     + 0 comments

    Mine in C++ using solution involving sorting, lower_bound, and upper_bound

    std::vector<int> matchingStrings(
    std::vector<std::string> strings,
    const std::vector<std::string>& queries)
{
    std::sort(strings.begin(), strings.end());
    std::vector<int> result;
    result.reserve(queries.size());
    for (const auto& query : queries)
    {
        auto lower = std::lower_bound(strings.begin(), strings.end(), query);
        auto upper = std::upper_bound(strings.begin(), strings.end(), query);
        int diff = (lower == strings.end()) ? 0 : std::distance(lower, upper);
        result.push_back(diff);
    }
    return result;
}