Untitled

class CustomSumCalculator:
    def __init__(self):
        self.result_list = []

    def custom_sum(self, nums, n, total):
        if n == 0:
            return total
        last_value = nums.pop()
        return self.custom_sum(nums, n - 1, total + (last_value ** 2) * (last_value > 0))

    def process_and_store_results(self, num_tests):
        if num_tests > 0:
            try:
                num_values = int(input())
                values_list = list(map(int, input().split()))
                result = self.custom_sum(values_list, num_values, 0)
                self.result_list.append(result)
                self.process_and_store_results(num_tests - 1)
            except ValueError as error:
                print(f"Error: {error}")

    def display_results(self, idx=0):
        if idx < len(self.result_list):
            print(self.result_list[idx])
            self.display_results(idx + 1)

def main():
    try:
        num_tests = int(input())
        calculator = CustomSumCalculator()
        calculator.process_and_store_results(num_tests)
        calculator.display_results()
    except ValueError as error:
        print(f"Error: {error}")
    except KeyboardInterrupt:
        print("\nOperation interrupted by the user.")

if __name__ == "__main__":
    main()