You were given a string of integer temperature values. Create a function `close_to_zero(t)` and return the closest value to 0 or `0` if the string is empty. If two numbers are equally close to zero, return the positive integer.
def close_to_zero(t):
    return sorted(map(int, t.split()), key=lambda i: (abs(i), -i))[0] if t else 0


def close_to_zero(t):
    return sorted(map(int, t.split()), key=lambda i: (abs(i), -i))[0] if t else 0

