"""
Aufgabe 78
(c) Jürgen Meier
www.3d-meier.de
22.03.2026
"""

import math

n = 100   # Endwert Laufvariable
s = 0     # Summe

for k in range(1, n+1):
    a = 1.0/(k**2)
    b = 1.0/((k+1)**2)

    s = s + math.sqrt(1+a+b)
    print(s)
       
print("-------------------")
print(10200.0/101)