public class MetodoC {

		public static void main(String[]args){

						int v[]= {4,6,8,3,1,-1};

							metodoC(v);



	}

 	public static boolean metodoC(int[]v){

 		boolean val = true;

 			int d = v.length/2;

 			int x = v[0] + v[d];

 					for (int i = 1; i < d && val; i++){

							int y = v[i] + v[d+i];

								if ( ( y != x ) || ( v[i] % 2 == 1 ) )

						val = false;

								}

								return val;

							}

	}