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「世界で闘うプログラミング力を鍛える本」Pythonコード解答例 - 1.3 URLify

Last updated at Posted at 2020-02-01

「世界で闘うプログラミング力を鍛える本」Pythonコード解答例 - 1.3 URLify

目次

CHAP1. 配列と文字列

  1. 重複のない文字列
  2. 同じ文字の数を数える
  3. URLify
  4. 回文の順列
  5. 一発変換
  6. 文字列圧縮
  7. 行列の回転
  8. "0"の行列
  9. 文字列の回転

Pythonコード解答例

def replaceSpaces(str,trueLength):

    spaceCount = 0

    for i in range(trueLength):
        if str[i] == " ":
            spaceCount = spaceCount + 1

    index = trueLength + spaceCount * 2

    target = [0] * index

    for i in range(trueLength-1,-1,-1):

        if str[i] == " ":
            target[index-1] = "0"
            target[index-2] = "2"
            target[index-3] = "%"
            index = index - 3

        else:
            target[index-1] = str[i]
            index = index - 1

    return "".join(target)

input_str = "Mr John Smith"
input_num = len(input_str)

print(replaceSpaces(input_str,input_num))
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