CF1230A Dawid and Bags of Candies

**题意:** 四个袋子里有糖果要分给两个人 一个袋子只能给一个人,可以一人得到多袋,不能自己保留或者打开 如果两个人分得的和相同则输出YES,反之输出NO

四个整数$1\leq a_i\leq 100$

YES或NO(大小写任意)

In the first sample test, Dawid can give the first and the third bag to the first friend, and the second and the fourth bag to the second friend. This way, each friend will receive $ 12 $ candies. In the second sample test, it's impossible to distribute the bags.