You are given three numbers. Is there a way to replace variables(变量) A, B and C with these numbers so the equality(等式) A + B = C is correct?
There are three numbers X1, X2and X3 (1 ≤ Xi ≤ 10^100), each on a separate(分开) line of input.
Output either "YES", if there is a way to substitute(替换) variables A, B and C with given numbers so the equality is correct, or "NO" otherwise.
1 2 3
YES