Common Gem Elements
Each string describes a rock’s composition, and each character represents an element found in it. The function gem_stones receives a list of strings arr. An element is considered a gem if it appears in every rock at least once. Return the number of such common characters.
Примеры
Ввод
["abcdde", "baccd", "eeabg"]Вывод
2Ввод
["abc", "abc", "abc"]Вывод
3Ввод
["ab", "cd"]Вывод
0Нужно реализовать
def gem_stones(arr: list[str]) -> int:
Теги
stringssethashmap
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