참고자료claude.aic++ std::equal_range() 관련 자료https://en.cppreference.com/w/cpp/algorithm/equal_range#:~:text=Although%20std::equal_range%20only%20requires%20[%20first%20%2C,binary%20search%20is%20valid%20for%20any%20value.&text=%E2%86%91%20Applying%20equal_range%20to%20a%20single%2Delement%20range,comparison%20is%20allowed%20by%20the%20complexity%20requirement.시간 복잡도O(logn)이다.설명std::equal_range 함수는 ..