def solve(coordinates):
    x = sorted([x for x,y in coordinates if x != 0])
    y = sorted([y for x,y in coordinates if y != 0])
    max_distance_x_values = max(x)-min(x)
    max_distance_y_values = max(y)-min(y)
    y0 = 0
    if abs(x[0])>abs(x[-1]):
        x0 = abs(x[0])
    else:
        x0 = abs(x[-1])
    if abs(y[0])>abs(x[-1]):
        y0 = abs(y[0])
    else:
        y0 = abs(y[-1])
    hyp = math.sqrt(x0**2+y0**2)
    possible_answers = [hyp, max_distance_x_values, max_distance_y_values]
    return float('{0:.12f}'.format(max(possible_answers)))