Assume you are a student studying in school.You are given a task to find first negative integer for each and every window of size k.

**Input Description:**

First line contains an integer n denoting the size of the array. The next line contains n space separated integers forming the array. The last line contains the window size k.

**Output Description:**

Print the first negative integer in that window.If all the numbers are positive print 0

```
Sample Input :
7
1 -2 -3 -4 5 6 -7
3
```

```
Sample Output :
-2 -2 -3 -4 -7
```

i couldnt understand the question...please explain the question..how window size will be in negative...