Python Arena

Letter Pattern

This is a great way to practice strings, indices, and letter case. Write a function accum that turns the string s into a chain of parts separated by hyphens. For each letter, use its position i: start with the uppercase version, then add i more copies of the same letter in lowercase.

Примеры

Ввод
"abcd"
Вывод
"A-Bb-Ccc-Dddd"
Ввод
"RqaEzty"
Вывод
"R-Qq-Aaa-Eeee-Zzzzz-Tttttt-Yyyyyyy"
Ввод
"cwAt"
Вывод
"C-Ww-Aaa-Tttt"

Нужно реализовать

def accum(s: str) -> str:

Теги

strings
PostgreSQLv16
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Här visas resultatet av din kod

Visible tests
1
Input
"abcd"
Expected"A-Bb-Ccc-Dddd"
2
Input
"RqaEzty"
Expected"R-Qq-Aaa-Eeee-Zzzzz-Tttttt-Yyyyyyy"
3
Input
"cwAt"
Expected"C-Ww-Aaa-Tttt"
4
Input
"a"
Expected"A"
5
Input
"ZpglnRxqenU"
Expected"Z-Pp-Ggg-Llll-Nnnnn-Rrrrrr-Xxxxxxx-Qqqqqqqq-Eeeeeeeee-Nnnnnnnnnn-Uuuuuuuuuuu"
6
Input
"cwAt!"
Expected"C-Ww-Aaa-Tttt-!!!!!"
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