Automated Scoring for Submissions

The judges are tired of manually computing scores for each submission. Your task is to automate this process. For each problem, a submission can score from 0 to 10. There are ( n ) test cases provided, where ( n ) is divisible by 10. These test cases are divided into 10 groups each containing ( \frac{n}{10} ) test cases. A submission earns 1 point for a group if and only if it passes every test case within that group. The final score is the sum of the points from all 10 groups.

Note:

• For simplicity, it is assumed that every group contains the same number of test cases.
• Your solution should compute the final score based on the provided results.

inputFormat

The input consists of two lines. The first line contains an integer ( n ) (( n ) is divisible by 10) representing the total number of test cases. The second line contains ( n ) space-separated integers. Each integer is either 0 (indicating failure) or 1 (indicating success).

outputFormat

Output a single integer representing the total score. For each group of ( \frac{n}{10} ) test cases, if all the cases are 1 (passed), the group contributes 1 point; otherwise, it contributes 0 points. The total score is the sum of the points from all 10 groups.

sample

10
1 1 1 1 1 1 1 1 1 1

10