import java.io.*;
import java.util.Scanner;
public class Uin8468hw3 {
	Scanner in = new Scanner(System.in);
	int numIter = 0;
	int choice = 0;
	int x = 0;
	int total = 0;
	String awesomeString = new String();
	FileWriter fstream;
	BufferedWriter out;

	public Uin8468hw3(){
		try{
			fstream = new FileWriter("outfile.txt");
			out = new BufferedWriter(fstream);
		}catch(Exception e){
				System.err.println("Error: " + e.getMessage());
		}

		System.out.print("Please enter number of iterations (integer larger than 0): ");
		numIter = in.nextInt();

		if (numIter > 0){
			for (int i = 0; i < numIter; i++){
				System.out.println("Please enter a choice (1 or 2) followed by a positive integer for x:");
				choice = in.nextInt();
				x = in.nextInt();

				if (choice == 1){
					System.out.println("" + factorial(x));
					awesomeString = "" + factorial(x) + "\n";
					try{
						out.write(awesomeString);
					}catch(Exception e){
						System.err.println("Error: " + e.getMessage());
					}
					total = 0;
				}else if (choice == 2){
					System.out.println("" + sum(x));
					awesomeString = "" + sum(x) + "\n";
					try{
						out.write(awesomeString);
					}catch(Exception e){
						System.err.println("Error: " + e.getMessage());
					}
					total = 0;
				}else{
					if (x < 0){
						System.out.print("Number " + numIter + " is less than 1. ");
					}else{
						System.out.print("Number " + numIter + "is not a valid choice. ");
					}
				}
			}
			try{
				out.close();
			}catch(Exception e){
				System.err.println("Error: " + e.getMessage());
			}
		}else{
			System.out.println("Please rerun the program entering an integer larger than 0.");
		}
	}

	public int factorial(int p){
		total = 1;
		for (int j = 1; j <= p; j++){
			total *= j;
		}
		return total;
	}

	public int sum(int q){
		for (int k = 1; k <= q; k++){
			total += k;
		}
		return total;
	}

	public static void main(String[] args) {
		Uin8468hw3 a = new Uin8468hw3();
	}

}