title: Denote number of elements in an array with input?
body: <p>Here is the input:</p>
  
  <p>First line of input file contains a single integer T which denotes the number of test cases. For each test case, there will be two lines. First line contains N which denotes number of elements in an array, and second line contains N space seperated integers.</p>
  
  <p>I know how to denote the number of test cases but not how to denote numbers of elements in an array. 
  I'm pretty new to c++ , so it would be nice if you answer noob friendly.</p>