int isSumTree(struct TNode* node)
{
int ls; // for sum of nodes in left subtree
int rs; // for sum of nodes in right subtree
if(node == NULL || IsLeafNode(node))
return 1;
if( isSumTree(node->left) && isSumTree(node->right))
{
if(node->left == NULL)
ls = 0;
else if(IsLeafNode(node->left))
ls = node->left->data;
else
ls = 2*(node->left->data);
if(node->right == NULL)
rs = 0;
else if(IsLeafNode(node->right))
rs = node->right->data;
else
rs = 2*(node->right->data);
return(node->data == ls + rs);
}
return 0;
}
int isSumTree(struct node* node)
{
int ls, rs;
if(node == NULL||(node->left == NULL && node->right == NULL))
return 1;
ls = sumnode(node->left);
rs = sumnode(node->right);
if((node->data== (ls+rs))&& isSumTree(node->left) && isSumTree(node->right))
return 1;
return 0;
}
int isSumTree(struct node* root){
//its a sum tree
if(root == NULL || (root->left == NULL && root->right == NULL) ){
return 1;
}
int suml = sum(root->left);
int sumr = sum(root->right);
printf("sum of left and right subtree %d %d\n",suml, sumr );
if(((suml + sumr) == root->item) && isSumTree(root->left) && isSumTree(root->right)){
return 1;
}
return 0;
}
int isSumTree(struct node* node)
{
int lefttree, righttree;
if(node ==0 ||(node->left == 0 && node->right == 0))
{
return 1;
}
lefttree = sum(node->left);
righttree = sum(node->right);
if((node->data == lefttree + righttree)&&isSumTree(node->left) && isSumTree(node->right))
{
return 1;
}
return 0;
}
int main(){
struct TNode* root=NULL;
printf("\nEnter the number of elements you want to insert : ");
int n;
scanf("%d",&n);
int i,data;
for(i=0;i<n;i++){
printf("\nEnter data : ");
scanf("%d",&data);
InsertBinaryTree(&root,data,n);
}
printf("\nInserted... %d nodes \n",n);
getch();
printf("\nPress enter to do level-order traversal : \n\n");
getch();
LevelOrderTraversal(root,n);
getch();
int result=isSumTree(root);
if(result){
printf("\n\nSum Tree");
}else{
printf("\nNot a sum tree");
}
return 0;
}
int main()
{
struct node *root = newNode(26);
root->left = newNode(10);
root->right = newNode(3);
root->left->left = newNode(4);
root->left->right = newNode(6);
root->right->right = newNode(3);
if(isSumTree(root))
printf("The given tree is a SumTree ");
else
printf("The given tree is not a SumTree ");
getchar();
return 0;
}
int main(){
struct node* root = build_node(26);
root->left = build_node(10);
root->right = build_node(3);
root->left->left = build_node(4);
root->left->right = build_node(6);
root->right->right = build_node(3);
if(isSumTree(root) == 1){
printf("Yes");
}
else{
printf("No");
}
}
int main()
{
struct node *root = insert(26);
root->left = insert(10);
root->right = insert(3);
root->left->left = insert(4);
root->left->right = insert(6);
root->right->right = insert(3);
if(isSumTree(root))
{
printf("Binary tree is a sumtree");
}
else
{
printf("Binary tree is not a sumtree");
}
return 0;
}