Help me in solving TRICOUNT1 problem

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 :pray:

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.