public void insert(int[] nums)
{
foreach (int num in nums)
{
Node421 curr = this.root;
for (int i = 31; i >= 0; i--)
{
int currBit = (num >> i) & 1;
if (!curr.children.ContainsKey(currBit))
{
curr.children.Add(currBit, new Node421());
}
curr = curr.children[currBit];
}
}
}
public Trie421()
{
this.root = new Node421();
}