Codeforces Round #647 (Div. 2) - Thanks, Algo Muse!B. Johnny and His Hobbies(异或)---题解
来源:http://codeforces.com/contest/1362/problem/BAmongJohnny’snumeroushobbies,therearetwoseeminglyharmlessones:applyingbitwiseoperationsandsneakingintohisdad’soffice.Asitisusuallythecasewithsmallchildre