public boolean double23(int[] nums) {
  if (nums.length <= 1) {
    return false;
  }
  boolean twoTwice = nums[0] == 2 && nums[1] == 2;
  boolean threeTwice = nums[0] == 3 && nums[1] == 3;
  return twoTwice || threeTwice;
}

public boolean double23(int[] nums) {
  if (nums.length >= 2) {
    int n0 = nums[0];
    int n1 = nums[1];
    return (n0 == 2 && n1 == 2) || (n0 == 3 && n1 == 3);
  }
  else {
    return false;
  }
}


public boolean double23(int[] nums) {
  return nums.length >= 2 &&
    ( (nums[0] == 2 && nums[1] == 2) || (nums[0] == 3 && nums[1] == 3) );
}