Python/maths/Binary_Exponentiation.py

26 lines
534 B
Python
Raw Normal View History

2019-05-10 11:03:05 +00:00
#Author : Junth Basnet
#Time Complexity : O(logn)
def binary_exponentiation(a, n):
if (n == 0):
return 1
elif (n % 2 == 1):
return binary_exponentiation(a, n - 1) * a
else:
b = binary_exponentiation(a, n / 2)
return b * b
try:
base = int(input('Enter Base : '))
power = int(input("Enter Power : "))
except ValueError:
print ("Invalid literal for integer")
result = binary_exponentiation(base, power)
print("{}^({}) : {}".format(base, power, result))