write a go solution for Description:
This problem is interactive.

We decided to play a game with you and guess the number x (1<=x<n), where you know the number n.

You can make queries like this:

- + c: this command assigns x=x+c (1<=c<n) and then returns you the value lfloorx/nrfloor (x divide by n and round down).

You win if you guess the current number with no more than 10 queries.

Input Format:
None

Output Format:
None

Note:
In the first sample initially x=2. After the first query x=3, lfloorx/nrfloor=1.

In the second sample also initially x=2. After the first query x=3, lfloorx/nrfloor=0. After the second query x=4, lfloorx/nrfloor=0. After the third query x=5, lfloorx/nrfloor=1.. Output only the code with no comments, explanation, or additional text.