public boolean splitArray(int[] nums) {
  switch(nums.length) {
    case 0:
      return true;
    case 1:
      return false;
  }

  int sum = sum(nums, nums.length - 1);
  if(sum % 2 != 0)
    return false;
  return true;
}
public int sum(int[] a, int n) {
    if (n == 0)
        return a[n];
    else
        return a[n] + sum(a, n-1);
}