Retos

Reto #1

def main():
    file = open('problem1.txt', 'r')
    lines = file.readlines()
    for line in lines:
        line = line.rstrip()
        numbers = line.split(' ')
        print(" ".join(detect_cycle(numbers)))
        
def detect_cycle(numbers):
    found = dict()
    result = list()
    for i, c in enumerate(numbers):
        if c not in found:
            found[c] = i
        else:
            for original_i, repeated_i in zip(range(found[c], i),
                                              range(i, len(numbers))):
                if numbers[original_i] == numbers[repeated_i]:
                    result.append(numbers[original_i])
                else:
                    break
            break
    return result or numbers
    
    
    Reto #2
    
def main():
    file = open('problem2.txt', 'r')
    lines = file.readlines()
    for line in lines:
        line = line.rstrip()
        numbers, k = line.split(';')
        numbers = numbers.split(',')
        print(",".join(reverse_groups(numbers, int(k))))

def reverse_groups(numbers, k):
    _reversed = list(chain.from_iterable(
        map(lambda x: x[::-1],
            zip(*(islice(numbers, i, None, k) for i in range(k))))))

    return _reversed + numbers[len(_reversed):]