Given a number as string(n) , find the remainder of the number when it is divided by 7
Example 1:
Input:
5
Output:
5

Example 2:
Input:
8
Output:
1

Your Task:
You only need to complete the function remainderwith7() that takes string n as parameter and returns an integer which denotes the remainder of the number when its divided by 7

Constraints:
1<=length of n <=105

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