public void FindNumsAppearOnce(int [] array,int num1[] , int num2[]) {
    int diff = 0;
    for(int num:array)   diff ^= num;
    diff &= -diff;
    for(int num:array){
        if((num&diff)==0)   num1[0] ^= num;
        else                num2[0] ^= num;
    }
}