//A simple program to calculate the amount of exp required to reach a specific level in MCMMO,
//a Minecraft mod for multiplayer.
import java.util.Scanner;
public class mcmmoExp {
	public static void main(String[] args) {
		//Ask the user for the level they want.
		Scanner input = new Scanner(System.in);
		System.out.println("Calculate exp total for what level?");
		int expInput = input.nextInt();
		System.out.println(expTotal(expInput));

	}
	//Calculates the total exp for the given level.
	public static int expTotal(int expInput){
			int expAcc = 0;
			int totalExp = 0;
			int currentLvl = 1;
			//Initializing some variables for calculation later.
			for (int i=1; i<=expInput; i++){

				/*The amount of XP needed to reach the next level are calculated with this simple formula:
				 * XPtoNextLevel = 1000 + (CurrentLevel * 20) For each level, this loop calculates out the
				 * amount of exp needed to level and adds that to totalExp. totalExp is then returned from
				 * the function and printed for the user to see.	*/
				expAcc = 1000 + (i*20);
				currentLvl = currentLvl + 1;
				totalExp = totalExp + expAcc;
			}
			return totalExp;
	}

}