Solve the programming task below in a Python markdown code block.
Alice has recently learned in her economics class that the market is said to be in equilibrium when the supply is equal to the demand.

Alice has market data for N time points in the form of two integer arrays S and D. Here, S_{i} denotes the supply at the i^{th} point of time and D_{i} denotes the demand at the i^{th} point of time, for each 1 ≤ i ≤ N.

Help Alice in finding out the number of time points at which the market was in equilibrium. 

------ Input Format ------ 

- The first line of input will contain an integer T — the number of test cases. The description of T test cases follows.
- Each test case contains three lines of input.
- The first line of each test case contains an integer N, the length of the arrays S and D.
- The second line of each test case contains N space-separated integers S_{1}, S_{2}, \ldots , S_{N}.
- The third line of each test case contains N space-separated integers D_{1}, D_{2}, \ldots , D_{N}. 

------ Output Format ------ 

For each test case, output the number of time points at which the market was in equilibrium.

------ Constraints ------ 

$1 ≤ T ≤ 10$
$1 ≤ N ≤ 100$
$1 ≤ S_{i}, D_{i} ≤ 100$ for every $1 ≤ i ≤ N$

----- Sample Input 1 ------ 
2
4
1 2 3 4
2 1 3 4
4
1 1 2 2
1 2 1 1
----- Sample Output 1 ------ 
2
1
----- explanation 1 ------ 
Test case $1$: For $i = 3$ and $i = 4$, we have supply equal to demand, hence the market is in equilibrium.

Test case $2$: For $i = 1$, we have supply equal to demand, hence the market is in equilibrium.