public class HuiWen{
	public static void main(String[] args) {
		char[] strs = {'2','4','d','4','2'};
		boolean huiwen = isHuiwen(strs, 0, strs.length -1,strs.length);
		System.out.println(huiwen);
	}
	
	public static boolean isHuiwen(char a[],int low,int high,int length){
		if(length == 1 || length == 0)
			return true;
		if (a[low] != a[high] || low >= high) {
			return false;
		}
		
		return isHuiwen(a, low + 1, high -1,length -2);
	}
}