diff --git a/leaf nodes sum in a binary tree b/leaf nodes sum in a binary tree
new file mode 100644
index 00000000..e6a2096b
--- /dev/null
+++ b/leaf nodes sum in a binary tree	
@@ -0,0 +1,37 @@
+ 
+#include<bits/stdc++.h> 
+using namespace std; 
+struct Node{ 
+   int data; 
+   Node *left, *right; 
+}; 
+Node *newNode(int data){ 
+   Node *temp = new Node(); 
+   temp->data = data; 
+   temp->left = temp->right = NULL; 
+   return temp; 
+} 
+void leafSum(Node *root, int *sum){ 
+   if (!root) 
+      return;  
+   if (!root->left && !root->right) 
+      *sum += root->data; 
+   leafSum(root->left, sum); 
+   leafSum(root->right, sum); 
+} 
+
+int main(){ 
+    
+   Node *root = newNode(1); 
+   root->left = newNode(2); 
+   root->left->left = newNode(4); 
+   root->left->right = newNode(5); 
+   root->right = newNode(3); 
+   root->right->right = newNode(7); 
+   root->right->left = newNode(6); 
+   root->right->left->right = newNode(8);  
+   int sum = 0; 
+   leafSum(root, &sum); 
+   cout << sum << endl; 
+   return 0; 
+} 
diff --git a/tower of honoi b/tower of honoi
new file mode 100644
index 00000000..4a6682fc
--- /dev/null
+++ b/tower of honoi	
@@ -0,0 +1,29 @@
+#include<iostream>
+using namespace std;
+
+//tower of HANOI function implementation
+void TOH(int n,char Sour, char Aux,char Des)
+{ 
+	if(n==1)
+	{
+		cout<<"Move Disk "<<n<<" from "<<Sour<<" to "<<Des<<endl;
+		return;
+	}
+	
+	TOH(n-1,Sour,Des,Aux);
+	cout<<"Move Disk "<<n<<" from "<<Sour<<" to "<<Des<<endl;
+	TOH(n-1,Aux,Sour,Des);
+}
+
+//main program
+int main()
+{ 
+	int n;
+	
+	cout<<"Enter no. of disks:";	
+	cin>>n;
+	//calling the TOH 
+	TOH(n,'A','B','C');
+	
+	return 0;
+}