You are given a sequence $a_1, a_2, \dots, a_n$ consisting of $n$ non-zero integers (i.e. $a_i \ne 0$).

You have to calculate two following values:

1. the number of pairs of indices $(l, r)$ $(l \le r)$ such that $a_l \cdot a_{l + 1} \dots a_{r - 1} \cdot a_r$ is negative;
2. the number of pairs of indices $(l, r)$ $(l \le r)$ such that $a_l \cdot a_{l + 1} \dots a_{r - 1} \cdot a_r$ is positive;

Input

The first line contains one integer $n$ $(1 \le n \le 2 \cdot 10^{5})$ — the number of elements in the sequence.

The second line contains $n$ integers $a_1, a_2, \dots, a_n$ $(-10^{9} \le a_i \le 10^{9}; a_i \neq 0)$ — the elements of the sequence.

Output

Print two integers — the number of subsegments with negative product and the number of subsegments with positive product, respectively.

见题面 Input 部分

见题面 Output 部分