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Discussion on: Daily Coding Puzzles

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Pierre Bouillon •

Awesome !
Unfortunately I don't have twitter.. but here are my answers:

Day 1

def day_1(sentence: str) -> str:
    result = []

    for word in sentence.split():
        if word.isalpha():
            word = word[1:] + word[0] + 'ay'
        result.append(word)

    return ' '.join(result)

Day 2
Pretty sure it can be waaaay better

def day_2(sequences: List[str]) -> List[str]:
    opening_seq = ('(', '[', '{')
    closing_seq = (')', ']', '}')

    matchs = {
        closing_seq[i]: opening_seq[i]
        for i in range(len(opening_seq))
    }

    def check(sequence: str) -> bool:
        if len(sequence) % 2:
            return False

        if not all([
            sequence.count(i) == sequence.count(matchs[i])
            for i in matchs
        ]):
            return False

        stack = []
        for c in sequence:
            if c in opening_seq:
                stack.append(c)

            elif c in closing_seq:
                if not stack:
                    return False

                elif stack.pop() != matchs[c]:
                    return False

        return not stack

    return ['YES' if check(s) else 'NO' for s in sequences]

Day 3

def day_3(sentence: str) -> str:
    return ' '.join([
        word if len(word) < 5 else word[::-1]
        for word in sentence.split()
    ])

Day 4

def day_4(limit: int) -> int:
    seq = [0, 1]
    while seq[-1] < limit:
        seq.append(sum(seq[-2:]))
    return sum([i for i in seq if i % 2 == 0])