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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文字列sと整数iと文字cが与えられるので、sの i文字目をcに書き換えたものを
出力してください。
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行目に整数 iと文字c が半角ス
ペース区切りで与えられます。
s
i 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 100文字以下
iは 1 以上 sの文字数以下
cは1文字
入力値最終行の末尾に改行が1 つ入る
期待する出力
sの i 文字目をcに書き換えたものを1 行で出力してください。
paiza
1 P
Paiza
ABCDEFGHIJKLMNOPQRSTUVW&XYZ
16 !
ABCDEFGHIJKLMNO!QRSTUVW&XYZ
62
Pythonでは、文字列の一部を書き換えることはできません。そこで、文字列を一
度分割してから再構成することを考えます。スライスを用いて文字列から部分文字
列を取得し、書き換えたい文字列と連結することで、書き換え後の文字列を作成し
ます。
元の文字列の変更する文字の位置より前の部分 + 変更する文字 +
元の文字列の変更する文字の位置より後ろの部分
なお、文字列の最初から特定のインデックスまでの部分文字列を取得する場合は ...
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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.