public class a25 { //Ueberladene Funktionen
	public static void main (String [] x){
		int a=2;
		int b=3;
		int c=5;
		double d=2.5;
		double e=3.5;
		double f=4.5;
		System.out.println(mittelwert(a,b));
		System.out.println(mittelwert(a,b,c));
		System.out.println(mittelwert(d,e));
		System.out.println(mittelwert(d,e,f));
		}
		
	static double mittelwert (int a, int b){
		return (double)(a+b)/2.0;
		}
	
	static double mittelwert (int a, int b, int c){
		return (double)(a+b+c)/3.0;
		}
	
	static double mittelwert (double a, double b){
		return (a+b)/2.0;
		}
		
	static double mittelwert (double a, double b, double c){
		return (a+b+c)/3.0;
		}
	}