C++)빈 벡터 만들고 초기화 2개의 벡터 병합하기

빈 벡터 만들고 초기화
https://www.includehelp.com/stl/create-an-empty-vector-and-initialize-by-pushing-values.aspx

Create an empty vector and initialize by pushing values in C++ STL

https://godog.tistory.com/entry/C-vector-%EC%83%9D%EC%84%B1-%EB%B0%8F-%EC%82%BD%EC%9E%85-%EC%82%AD%EC%A0%9C

C++ vector 생성 및 삽입, 삭제

2개 벡터 합치기
https://stackoverflow.com/questions/16226846/how-would-one-push-back-an-empty-vector-of-pairs-to-another-vector

How would one push back an empty vector of pairs to another vector?

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