Find centralized, trusted content and collaborate around the technologies you use most.
Teams
Q&A for work
Connect and share knowledge within a single location that is structured and easy to search.
リストがあり、別の要素を挿入し(1 3 4)た後、結果が.12(1 2 3 4)
(1 3 4)
1
2
(1 2 3 4)
これを一般的な方法で効率的に行うにはどうすればよいでしょうか?