Answer problem
I would like to give some feedback about ...
From: http://www.checkio.org/mission/days-diff/solve/
HTTP_USER_AGENT:
Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/46.0.2490.86 Safari/537.36
Please check the day sum of (1,1,1) to (9999,12,31).
My result is 3652133.