関連ワード:  how to erase element from vector cpp    how to remove element from vector cpp    how to erase element from vector c++    how to remove first element from vector cpp    how to remove element from vector c++ by index    how to remove element from vector c++ by value    how to erase specific element from vector c++    how to remove element from std vector    how to remove last element from vector in cpp    how to remove specific element from vector in cpp