题目描述
A particular month has 30 days, numbered from 1 to 30.
Day 1 is a Monday, and the usual 7-day week is followed (so day 2 is Tuesday, day 3 is Wednesday, and so on).
Every Saturday and Sunday is a holiday. There are N festival days, which are also holidays. Note that it is possible for a festival day to occur on a Saturday or Sunday.
You are given the dates of the festivals. Determine the total number of holidays in this month.
------ Input Format ------
- The first line of input contains a single integer T, denoting the number of test cases. The description of T test cases follows.
- The first line of each test case contains an integer N denoting the number of festival days.
- The second line of each test case contains $N distinct space-separated integers A_{1}, A_{2}, \ldots A_{N},$ denoting the festival days. Note that the A_{i} are not necessarily given in sorted order.
------ Output Format ------
For each test case, output a new line containing the total number of holidays.
------ Constraints ------
$1 ≤ T ≤ 1000$
$1 ≤ N ≤ 30$
$1 ≤ A_{i} ≤ 30$
- All the $A_{i}$ are distinct
----- Sample Input 1 ------
3
2
5 7
3
23 1 6
1
13
----- Sample Output 1 ------
9
10
8
----- explanation 1 ------
Test Case $1$: Days $6, 13, 20$ and $27$ are Saturdays, and days $7, 14, 21, 28$ are Sundays. The festivals fall on day $5$ and day $7$, but day $7$ is already a Sunday. This gives us $9$ holidays in total — days $5, 6, 7, 13, 14, 20, 21, 27, 28$.
Test Case $2$: Days $6, 13, 20$ and $27$ are Saturdays, and days $7, 14, 21, 28$ are Sundays. The festivals fall on day $1$, day $6$, and day $23$. This gives us $10$ holidays in total — days $1, 6, 7, 13, 14, 20, 21, 23, 27, 28$.
Test Case $3$: Days $6, 13, 20$ and $27$ are Saturdays, and days $7, 14, 21, 28$ are Sundays. The only festival is on day $13$, which is already a holiday. This gives us $8$ holidays in total — days $6, 7, 13, 14, 20, 21, 27, 28$.
输入格式
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输出格式
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