public class LuoDanDeShu {
	public static void main(String[] args) {
		//构造一个数组
		int arr[]= {25,25,45,45,6,6,94,94,5,1,1};
		//因为A^A^B^C^C=B  连续异或可以去重
		int x=0;
		for (int i = 0; i < arr.length; i++) {
			x=arr[i]^x;
		}
		System.out.println(x);
	}
}