from math import *

def f(x):
    y=1/(1+x**2)
    return y

def Rectangles(n):
    Som=0
    for k in range(1,n):
        Som=Som+f(k/n)
    Som1=1/n*(Som+f(1))
    Som2=1/n*(Som+f(0))
    return Som1,Som2