A Binary Problem

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Points: 3
Time limit: 1.0s
Memory limit: 64M

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Problem type

You are given an array a of N binary integers. You are to print 1 if there is an odd number of 1s in a, and 0 otherwise.

Input Specification

The first line will contain the integer N\ (1 \le N \le 10^5).

The next line will contain N binary integers, a_1, a_2, a_3, \ldots, a_N\ (a_i \in{\{0,1\}}).

Output Specification

Output 1 if there is an odd number of 1s in a, and 0 otherwise.

Sample Input

5
1 0 1 1 1

Sample Output

0

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