"""
Problem:
Each new term in the Fibonacci sequence is generated by adding the previous two terms. 
                0,1,1,2,3,5,8,13,21,34,55,89,..
Every third term from 0 is even So using this I have written a simple code
By considering the terms in the Fibonacci sequence whose values do not exceed n, find the sum of the even-valued terms.
e.g. for n=10, we have {2,8}, sum is 10.
"""
"""Python 3"""
n = int(input())
a = 0
b = 2
count = 0
while 4 * b + a < n:
    c = 4 * b + a
    a = b
    b = c
    count = count + a
print(count + b)

"""
Problem:
Each new term in the Fibonacci sequence is generated by adding the previous two terms. 
                0,1,1,2,3,5,8,13,21,34,55,89,..
Every third term from 0 is even So using this I have written a simple code
By considering the terms in the Fibonacci sequence whose values do not exceed n, find the sum of the even-valued terms.
e.g. for n=10, we have {2,8}, sum is 10.
"""
"""Python 3"""
n = int(input())
a = 0
b = 2
count = 0
while 4 * b + a < n:
    c = 4 * b + a
    a = b
    b = c
    count = count + a
print(count + b)

Problem: Each new term in the Fibonacci sequence is generated by adding the previous two terms.                  0,1,1,2,3,5,8,13,21,34,55,89,.. Every third term from 0 is even So using this I have written a simple code By considering the terms in the Fibonacci sequence whose values do not exceed n, find the sum of the even-valued terms. e.g. for n=10, we have {2,8}, sum is 10. Python 3