August 2025
Intermediate
216 pages
5h 41m
Japanese
Content preview from Pythonレベルアップドリル 初心者から一歩進むための厳選問題集
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★★★★★
6
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あなたが利用しているブラウザでは検索ワードの履歴を見ることができません。
そこで、あなたは検索ワードの履歴を見る機能を自分で作ることにしました。
検索ワードの履歴を作るには、検索ワード w が以前に入力されたことがある場合、
「履歴中のwを削除する」「履歴の先頭にwを追加する」の2つの処理を実行し、検
索ワードw が以前に入力されたことがない場合は、「履歴の先頭に w を追加する」の
処理のみを実行します。
検索ワードwがn個与えられるので、n個の検索ワードが与えられた後の履歴を
表示するプログラムを書いてください。
入力される値
次の形式で標準入力によって、1行目には検索ワードの数を表す整数nが与えられ、
続くn 行では検索ワード w_iが与えられます。
n行のうちの i行目（1≦i ≦n）に与えられる検索ワードw_iは、小文字のアルファ
ベット"a"～"z" のみからなる文字列です。
入力は合計n+1 行で、最終行の末尾に改行が 1つ入ります。
n
w_1
w_2
……
w_n
すべてのテストケースにおいて、以下の条件を満たします。
1≦n≦100
w_i(1≦i≦n)に対して、w_iの文字数が 20 を超えない
期待する出力
検索ワードをn個入力した後の検索履歴を出力してください。出力の最後に改行
を入れ、余計な文字、空行を含んではいけません。
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.