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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先述のコードでは、forの後の変数名に_（アンダースコア）を使っています。_に代入され
た値は、for文の中では基本的に使われません。上記のfor文では、range(n)で for文を n回
繰り返せばよく、その回数は処理に必要ないので、_を使用して記述しています。このよう
に、プログラムの中で利用しない値を変数に代入する際には、変数名に_ を使うことがあり
ます。なお、この記述方法は慣習的なもので、Pythonの文法的な制約ではないので、「必
ずこう書かなければならない」というものではありません。
On e
Po in t
★★★★★
6
★
★★★★
文字列sと文字cが与えられるので、cはsの何文字目に現れるかを調べてください。
入力される値
次の形式で標準入力によって、1行目に文字列 s、2行目に文字 c が1行で与えられ
ます。
s
c
また、入力される値は、次の条件を満たします。
sは 1 文字以上 10000文字以下
cは1文字
cは s に 1文字だけ含まれる
入力値最終行の末尾に改行が1 つ入る
期待する出力
cは s の何文字目に現れるかを1行で出力してください。
paiza
p
68
1
ABCDEFGHIJKLMNO!QRSTUVW&XYZ ...
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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.