William has an array of non-negative numbers $$$a_1, a_2, \dots, a_n$$$. He wants you to find out how many segments $$$l \le r$$$ pass the check. The check is performed in the following manner:
The first line contains a single integer $$$n$$$ ($$$1 \le n \le 10^6$$$), the size of array $$$a$$$.
The second line contains $$$n$$$ integers $$$a_1, a_2, \dots, a_n$$$ ($$$0 \le a_i \le 10^{18}$$$), the contents of array $$$a$$$.
Output a single number — the total number of segments that passed the check.
5 1 2 3 4 5
9
10 0 5 7 3 9 10 1 6 13 7
18
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