powers of two in C#

main.cs

// Main function in C#
static void Main(string[] args)
    {
        long T = Convert.ToInt64(Console.ReadLine()); // Read # of Cases

        for (int i = 0; i < T; i++){
            int N = Convert.ToInt32(Console.ReadLine()); // Read N
            if (N == -1) { // if N==-1, end program
                break;
            }

            // Generate our A set of powers of two
            var A = powers_of_two(N);

            // Print A set in terminal
            foreach(var item in A)
            {
                Console.Write(item + " ");
            }
            Console.WriteLine();

            // Read B set from terminal
            var B_string = Console.ReadLine();
            List<long> B = B_string.Split(' ').ToList().Select(x => Convert.ToInt64(x)).ToList();
            
            // Solve Case
            var C = solve_sum(A,B);
            
            // Print result
            foreach(var item in C)
            {
                Console.Write(item + " ");
            }
            Console.WriteLine();
        }
    }