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ZOJ Problem Set - 4025
King of Karaoke

Time Limit: 1 Second      Memory Limit: 65536 KB

It's Karaoke time! DreamGrid is performing the song Powder Snow in the game King of Karaoke. The song performed by DreamGrid can be considered as an integer sequence $D_1, D_2, \dots, D_n$, and the standard version of the song can be considered as another integer sequence $S_1, S_2, \dots, S_n$. The score is the number of integers $i$ satisfying $1 \le i \le n$ and $S_i = D_i$.

As a good tuner, DreamGrid can choose an integer $K$ (can be positive, 0, or negative) as his tune and add $K$ to every element in $D$. Can you help him maximize his score by choosing a proper tune?


There are multiple test cases. The first line of the input contains an integer $T$ (about 100), indicating the number of test cases. For each test case:

The first line contains one integer $n$ ($1 \le n \le 10^5$), indicating the length of the sequences $D$ and $S$.

The second line contains $n$ integers $D_1, D_2, \dots, D_n$ ($-10^5 \le D_i \le 10^5$), indicating the song performed by DreamGrid.

The third line contains $n$ integers $S_1, S_2, \dots, S_n$ ($-10^5 \le S_i \le 10^5$), indicating the standard version of the song.

It's guaranteed that at most 5 test cases have $n > 100$.


For each test case output one line containing one integer, indicating the maximum possible score.

Sample Input

1 2 3 4
2 3 4 6
-5 -4 -3 -2 -1
5 4 3 2 1

Sample Output



For the first sample test case, DreamGrid can choose $K = 1$ and changes $D$ to $\{2,3,4,5\}$.

For the second sample test case, no matter which $K$ DreamGrid chooses, he can only get at most 1 match.

Author: CHEN, Shihan
Source: The 15th Zhejiang Provincial Collegiate Programming Contest Sponsored by TuSimple
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