Project Euler problem 2 pyhtonic solution (#629)

* Project Euler problem 2 pyhtonic solution

* Project Euler problem 2 made small changes

project_euler/problem_02/sol1.py

@@ -18,9 +18,7 @@ i=1
 j=2 
 sum=0
 while(j<=n):
-    if((j&1)==0): #can also use (j%2==0)
+    if j%2 == 0:
         sum+=j
-    temp=i
-    i=j
-    j=temp+i
+    i , j = j, i+j
 print(sum)

project_euler/problem_02/sol3.py

@@ -12,9 +12,7 @@ a=0
 b=2
 count=0
 while 4*b+a<n:
-    c=4*b+a
-    a=b
-    b=c
-    count=count+a
+    a, b = b, 4*b+a
+    count+= a
 print(count+b)