Added ref link to optimization logic

Srishtik2310 · Srishtik2310 · commit 6089766c663f · 2021-10-22T17:13:57.000+05:30
diff --git a/project_euler/problem_686/sol1.py b/project_euler/problem_686/sol1.py
@@ -114,6 +114,9 @@ def solution(number: int = 678910) -> int:
     we will increment by 93.
     3) if log_difference() < lowerbound, we increment by 196.
 
+    Ref link to the above logic:
+    https://math.stackexchange.com/questions/4093970/powers-of-2-starting-with-123-does-a-pattern-exist
+
     >>> solution(1000)
     284168
 

Original file line number	Diff line number	Diff line change
`@@ -114,6 +114,9 @@ def solution(number: int = 678910) -> int:`
`114`	`114`	`we will increment by 93.`
`115`	`115`	`3) if log_difference() < lowerbound, we increment by 196.`
`116`	`116`
	`117`	`+ Ref link to the above logic:`
	`118`	`+ https://math.stackexchange.com/questions/4093970/powers-of-2-starting-with-123-does-a-pattern-exist`
	`119`	`+`
`117`	`120`	`>>> solution(1000)`
`118`	`121`	`284168`
`119`	`122`