def solve(coordinates):
    X, Y = zip(*coordinates)
    max_X, min_X = max(X), min(X)
    max_Y, min_Y = max(Y), min(Y)
    absminX, absminY = abs(min_X), abs(min_Y)
    rangeX = max_X - min_X
    rangeY = max_Y - min_Y
    max_range = max(rangeX, rangeY)
    if max_range > max([absminX, max_X, max_Y, absminY]):
        return float('{0:.12f}'.format(max_range))
    distance = (max(max_X, absminX)**2 + max(max_Y, absminY)**2) ** 0.5
    return float('{0:.12f}'.format(distance))