def nearest_value(values: set[int], one: int) -> int:

def nearest_value(values: set[int], one: int) -> int:
    # your code here
    l = list(values)
    l.sort()
    l.insert(0, -abs(l[0] - one))
    l.insert(len(l), abs(l[-1] - one))
    z = list(map(lambda x: abs(one - x), l))
    return l[z.index(min(z))]