Write a program that reads sequences of natural numbers, and for each one tells if it has two elements such that their sum is an odd number.

**Input**

Input consists of several sequences, each one in a line.
Each sequence consists of a natural number *n*,
followed by *n* natural numbers *x*_{1}, …, *x*_{n}.

**Output**

For each input sequence, print “`yes`” or “`no`”
depending on if it is possible to find two elements
*x*_{i} and *x*_{j} (with *i* ≠ *j*)
such that *x*_{i} + *x*_{j}
is an odd number.

Public test cases

**Input**

6 3 5 7 15 13 1 2 0 1

**Output**

no yes

Information

- Author
- Salvador Roura
- Language
- English
- Translator
- Carlos Molina
- Original language
- Catalan
- Other languages
- Catalan
- Official solutions
- C++
- User solutions
- C++