include

using namespace std;
typedef struct BiNode {
char data;
struct BiNode* lchild, * rchild;
}BiTNode, * BiTree;

void CreateBiTree(BiTree& T)//创建一个二叉树
{
char ch;
cin >> ch;
if (ch == '#') T = NULL;
else {
T = new BiTNode;
T->data = ch;
CreateBiTree(T->lchild);
CreateBiTree(T->rchild);
}
}

int NodeCount(BiTree T)//统计头结点（递归）
{
if (T == NULL) return 0;//判空
if (T->lchild == NULL && T->rchild != NULL)//左孩子为空，右孩子不为空
return NodeCount(T->rchild) + 1;//递归右孩子当做下一次递归的根节点重复递归。下同
if (T->lchild != NULL && T->rchild == NULL)
return NodeCount(T->lchild) + 1;
if (T->lchild != NULL && T->rchild != NULL);
return NodeCount(T->rchild) + NodeCount(T->lchild);
}

int main() {
BiTree T;
CreateBiTree(T);
printf("%d", NodeCount(T));
return 0;
}