题目描述
Our juniors has just entered in coding community. Their first task is to find the frequency of Best numbers present in given list of elements.
Best numbers are numbers which are divisible by 2.
SAMPLE INPUT
2
5
1 2 3 4 5
3
1 3 5
SAMPLE OUTPUT
2
0
Explanation
Number of test cases=2
1st test case, number of elements =5
Best numbers are 2 , 4 ; frequency=2
2nd test case, number of elements =3
No Best numbers
输入格式
见题面
输出格式
见题面
样例输入
2
5
1 2 3 4 5
3
1 3 5
SAMPLE
样例输出
2
0