Added Solution to Problem 2 in a simple approach

Project Euler/Problem 02/sol3.py

@@ -0,0 +1,20 @@
+'''
+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)
+