Pairs of a sequence (2) P51153

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 $x_1, \dots, x_n$.

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 $i \neq j$) such that $x_i + x_j$ is an odd number.