comparing subtrees question..

i nee to write a function which desides if the right subtree has more red nodes then the left sub tree

Code:

---

#include <stdio.h>
#include <stdlib.h>
#define FALSE 0
#define TRUE 1
#define RED 1
#define BLUE 2

typedef struct {
    int key;
    int color;
}Data;


typedef struct TreeNode{
    struct TreeNode *father;
    struct TreeNode *left;
        struct TreeNode *right;
        Data TreeNode_info;
}TreeNode;
 
int main()
{

        return 0;
}

int isRedRight(TreeNode * root)
{
  if (root==NULL)
  {
    return 0;
  }
  if ((root->TreeNode_info==RED)&&(root->left==NULL)&&(root->left==NULL))
  {
    return 1;
  }
  else
  {
      if (isRedRight(root->right)>isRedRight(root->left))
          {
          return 1;
          }
  }

}

---

i cant return a number of nodes because in this is a "boolean " function
it return only true 1 or false 0
??

Without getting bogged down by coding, first try to come-up with an algorithm for doing the task.

write another function first - that counts number of nodes in the subtree

thanks :)