My issue
I don’t understand what is meant by f(A)
My code
t=int(input())
for i in range(t):
N=int(input())
A=list(map(int,input().split()))
f_A=sum(A)
print(f_A)
Problem Link: Triangle Count (Easy) Practice Coding Problem
In this problem what is the function of f_A briefly explain how to write the code for it and pls explain 
We need to select two elements from the existing array (consider A and B) and choose an arbitrary integer (say C) such that side lengths of size A, B and C form a valid triangle. We need to find all possible C values over all pairs of elements in the array and return the number of distinct C values.