Parallelogram

Very easy

Execution time limit is 1 second

Runtime memory usage limit is 128 megabytes

Given four numbers $a, b, c, d$ , defining lengths of pieces. Find out, if it is possible to form a parallelogram from these pieces.

Input

Four real numbers $a, b, c, d$ .

Print a word "YES" if it is possible to form a parallelogram or "NO" otherwise.

Input #1

Answer #1

Submissions 36K

Acceptance rate 27%