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AtCoder初心者 DailyTrainingメモ 2023/11/2

Last updated at Posted at 2023-11-02

参考URL

pythonでの順列全探索
https://qiita.com/wihan23/items/107dfff1ecada60845b1

ABC225 A-問題

問題文
英小文字のみからなる長さ3の文字列Sが与えられます。
Sの各文字を並び替えて得られる文字列は、何種類ありますか?

ポイント
・順列全探索は、itertools を使う
・set で重複を削除する

順列全探索
225A.py
# 順列全探索は、「itertools」をインポートする
import itertools

# 入力
S = str(input())

# 順列全探索結果をset に格納して重複を削除
ST = set(itertools.permutations(S))

# set の要素数が答え
print(len(ST))
シンプルな場合分けの解答
225A_2.py
# リストに入力
L = list(input())

# setに格納して文字数を確認する
st = set(L)

# 文字の種類別に何通りかを場合分けする
if len(st) == 1:
    ans = 1
elif len(st) == 2:
    ans = 3
elif len(st) == 3:
    ans = 6

print(ans)
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