Tower of Hanoi is a mathematical puzzle which consists of three towers or rods and also consists of n disks. You can move only one disk at a time from the top of any tower. \begin{array}{l} $T(n) = 2^k * T(n-k) + 2^{k-1} + 2^{k-2} + ... + 2^2 + 2^1 + 1 \qquad(2)$ Fortunately a Tower of Hanoi game with 64 disks needs about 585 billion years when one is moving one disk per second and our sun will evolve into a red giant and then a white dwarf in about 5 billion years, so you we shouldn't worry about the priests of Brahma finishing the game before you have finished whatever you think is important to finish in a mens life. $\text{Putting }T(n-2) = 2T(n-3)+1 \text{ in eq(1), we get}$ The tower of Hanoi problem is used to show that, even in simple problem environments, numerous distinct solution strategies are available, and different subjects may learn different strategies. When we run code or an application in our machine it takes time â CPU cycles. I have to implement an algorithm that solves the Towers of Hanoi game for k pods and d rings in a limited number of moves (let's say 4 pods, 10 rings, 50 moves for example) using Bellman dynamic programming equation (if the problem is solvable of course). So every morning you do a series of tasks in a sequence: first you wake up, then you go to the washroom, eat breakfast, get prepared for the office, leave home, then you may take a taxi or bus or start walking towards the office and, after a certain time, you reach your office. ... Use MathJax to format equations. Then move disk 2 to dest tower on top of disk 3. [ Full-stack software engineer | Backend Developer | Pythonista ] C Program To Solve Tower of Hanoi without Recursion. In our case, the space for the parameter for each call is independent of n, meaning it is constant. The "Towers of Hanoi" Puzzle, its Origin and Legend. Play Tower of Hanoi. The Pseudo-code of the above recursive solution is shown below. For example, the processing time for a core i7 and a dual core are not the same. In fact, I think itâs not only important for software development or programming, but for everyone. Using Back substitution method T(n) = 2T(n-1) + 1 can be rewritten as, $T(n) = 2(2T(n-2)+1)+1,\text{ putting }T(n-1) = 2T(n-2)+1$ 1, & \text{if $n=1$} \\ Hence, the recursive solution for Tower of Hanoi having n disks can be written as follows, $$TowerofHanoi(n, source, dest, aux) = \text{Move disk 1 from source to dest}, \text{if $n=1$}, Now, letâs try to build a procedure which helps us to solve the Tower of Hanoi problem. Move three disks in Towers of Hanoi Our mission is to provide a free, world-class education to anyone, anywhere. And finally, move disk 1 and disk 2 from aux to dest tower i.e. The Tower of Hanoi â Myths and Maths is a book in recreational mathematics, on the tower of Hanoi, baguenaudier, and related puzzles.It was written by Andreas M. Hinz, Sandi KlavÅ¾ar, UroÅ¡ MilutinoviÄ, and Ciril Petr, and published in 2013 by Birkhäuser, with an expanded second edition in 2018. I enjoy learning and experiencing new skills. So it has exponential time complexity. if disk 1 is on a tower, then all the disks below it should be less than 3. $$. Thus, solving the Tower of Hanoi with \(k\) disks takes \(2^k-1\) steps. Find below the implementation of the recursive solution of Tower of Hanoi, Backtracking - Explanation and N queens problem, CSS3 Moving Cloud Animation With Airplane, C++ : Linked lists in C++ (Singly linked list), Inserting a new node to a linked list in C++. In this case, determining an explicit pattern formula would be more useful to complete the puzzle than a recursive formula. freeCodeCamp's open source curriculum has helped more than 40,000 people get jobs as developers. Next lesson. When we reach the end, this concept will be clearer. For eg. Tower of Hanoi Solver Solves the Tower of Hanoi in the minimum number of moves. This video explains how to solve the Tower of Hanoi in the simplest and the most optimum solution that is available. Letâs go through each of the steps: You can see the animated image above for a better understanding. Practice: Move three disks in Towers of Hanoi. Our mission: to help people learn to code for free. Here is a summary of the problem: To solve the Tower of Hanoi problem, we let T[n] be the number of moves necessary to transfer all the disks. Suppose we have a stack of three disks. This is the skeleton of our solution. The game's objective is to move all the disks from one rod to another, so that a larger disk never lies on top of a smaller one. The largest disk (nth disk) is in one part and all other (n-1) disks are in the second part. To link to this page, copy the following code to your site: We can use B as a helper to finish this job. Tower of Hanoi is a mathematical puzzle which consists of three towers(or pegs) and n disks of different sizes, numbered from 1, the smallest disk, to n, the largest disk. Studying the N=3 MToH puzzle, I realized that what breaks the base 3 rule is the possibility of the smallest disk to move to a free post (step 5 in Table Magnetic Tower of Hanoi (: . The Tower of Hanoi or Towers of Hanoi is a mathematical game or puzzle. The puzzle starts with the disks in a neat stack in ascending order of size on one rod, the smallest at the top. How to make your own easy Hanoi Tower 6. No larger disk may be placed on top of a smaller disk. Now we have an ordinary, non-recurrent expression for T nâ¦ For the single increase in problem size, the time required is double the previous one. The main aim of this puzzle is to move all the disks from one tower to another tower. For the towers of Hanoi problem, the implication of the correspondence with n-bit numbers is a simple algorithm for the task. This is the second recurrence equation you have seen in this module. No large disk should be placed over a small disk. Tower of Hanoi. MathJax reference. Khan Academy is a 501(c)(3) nonprofit organization. That is â¦ You can say all those steps form an algorithm. In order to move the disks, some rules need to be followed. The Tower of Hanoi is a famous problem which was posed by a French mathematician in 1883. * is a recurrence , difference equation (linear, non-homogeneous, constant coefficient) Learn How To Solve Tower of Hanoi without Recursion in C Programming Language. Our mission is to provide a free, world-class education to anyone, anywhere. December 2006 The Towers of Hanoi The Towers of Hanoi The Towers of Hanoi puzzle was invented by the French mathematician Edouard Lucas in 1883. Let’s start the problem with n=1 disk at source tower. After the explanation of time complexity analysis, I think you can guess now what this isâ¦This is the calculation of space required in ram for running a code or application. T(n) = Challenge: Solve Hanoi recursively. Title: Tower of Hanoi - 4 Posts. An explicit pattern permits one to form an equation to find any term in the pattern without listing all the terms before it (Tower of Hanoi, 2010, para. Materials needed for Hanoi Tower 5. At first, all the disks are kept on one peg(say peg 1) with the largest peg at the bottom and the size of pegs gradually decreases to the top. Notice that in order to use this recursive equation, you would always have to know the minimum number of moves (M n) of the preceding (one disk smaller) tower. Letâs see how. Get started, freeCodeCamp is a donor-supported tax-exempt 501(c)(3) nonprofit organization (United States Federal Tax Identification Number: 82-0779546). T 0 = 0, T 1 = 1 7 Initial Conditions * T n = 2 T n - 1 + 1 n $ 2 T n is a sequence (fn. $T(n)=2^2 *(2T(n-3) + 1) + 2^1 + 1$ 2T(n-1), & \text{if $n>1$} Three simple rules are followed: Now, letâs try to imagine a scenario. + 2n-1 which is a GP series having common ratio r=2 and sum = 2n - 1. Solving Towers Of Hanoi Intuitively The Towers of Hanoi problem is very well understood. There are three pegs, and on the first peg is a stack of discs of different sizes, arranged in order of descending size. 16.944 Partidas jugadas, ¡juega tú ahora! If k is 1, then it takes one move. When we do the second recursive call, the first one is over. It is, however, non-trivial and not as easily understood. In this problem, you will be working on a famous mathematical puzzle called The Tower of Hanoi. What you need to do is move all the disks from the left hand post to the right hand post. In simple terms, an algorithm is a set of tasks. Tree of tower of hanoi (3 disks) This is the full code in Ruby: def tower(disk_numbers, source, auxilary, destination) if disk_numbers == 1 puts "#{source} -> #{destination}" return end tower(disk_numbers - 1, source, destination, auxilary) puts "#{source} -> #{destination}" tower(disk_numbers - 1, auxilary, source, destination) nil end Challenge: Solve Hanoi recursively. The objective of the puzzle is to move the entire stack to another rod, obeying the following simple rules: 1) Only one disk can be moved at a time. --Sydney _____ Date: 5 Jan 1995 15:48:41 -0500 From: Anonymous Newsgroups: local.dr-math Subject: Re: Ask Dr. Inserting a new node in a linked list in C. 12 Creative CSS and JavaScript Text Typing Animations. Running Time. Hanoi Tower Math 4. If \(k\) is 1, then it takes one move. Then, move disk 3 from source to dest tower. This is computationally very expensive. It consists of three pegs mounted on a board together and consists of disks of different sizes. Hi, I am studying the Tower of Hanoi problem in Donald Knuth's Concrete Mathematics book, and I do not understand his description of solving the problem by induction. Hence: After these analyses, we can see that time complexity of this algorithm is exponential but space complexity is linear. You can select the number of discs and pegs (within limits). How many moves does it take to solve the Tower of Hanoi puzzle with \(k\) disks?. We can break down the above steps for n=3 into three major steps as follows. But itâs not the same for every computer. Not exactly but almost, it's the double plus one: 15 = (2) (7) + 1. Our mission is to provide a â¦ These disks are stacked over one other on one of the towers in descending order of their size from bottom i.e. Logic Games Fun Games. When moving the smallest piece, always move it to the next position in the same direction (to the right if the starting number of pieces is even, to the left if the starting number of pieces is odd). Running Time. To solve this problem there is a concept used in computer science called time complexity. Suppose you work in an office. For example, in order to complete the Tower of Hanoi with two discs you must plug 2 into the explicit formula as ânâ and therefore, â¦ Studying the N=3 MToH puzzle, I realized that what breaks the base 3 rule is the possibility of the smallest disk to move to a free post (step 5 in Table Magnetic Tower of Hanoi (: . Because when there will be one disk in our stack then it is easy to just do that final step and after that our task will be done. Disks can be transferred one by one from one pole to any other pole, but at no time may a larger disk be placed on top of a smaller disk. Tower of Hanoi is a mathematical puzzle where we have three rods and n disks. 2.2. Tower of Hanoi â Origin of the Name 2. Viewed 20k times 1. The terminal state is the state where we are not going to call this function anymore. How to make your own easy Hanoi Tower 6. Tower Of Hanoi. 'Get Solution' button will generate a random solution to the problem from all possible optimal solutions - note that for 3 pegs the solution is unique (and fairly boring). Celeration of Executive Functioning while Solving the Tower of Hanoi: Two Single Case Studies Using Protocol Analysis March 2010 International Journal of Psychology and Psychological Therapy 10(1) 18.182 Partidas jugadas, ¡juega tú ahora! I love to code in python. Any idea? Also, I tried to give you some basic understanding about algorithms, their importance, recursion, pseudocode, time complexity, and space complexity. The Colored Magnetic Tower of Hanoi â the "100" solution . Here’s what the tower of Hanoi looks for n=3. Move three disks in Towers of Hanoi. This is an animation of the well-known Towers of Hanoi problem, generalised to allow multiple pegs and discs. Now we need to find a terminal state. S. Tanny MAT 344 Spring 1999 72 Recurrence Relations Tower of Hanoi Let T n be the minimum number of moves required. But you cannot place a larger disk onto a smaller disk. The rules are:- Juega online en Minijuegos a este juego de Pensar. I hope you havenât forgotten those steps we did to move three disk stack from A to C. You can also say that those steps are the algorithm to solve the Tower of Hanoi problem. An algorithm is one of the most important concepts for a software developer. I have studied induction before, but I just don't see what he is doing here. The tower of Hanoi (commonly also known as the "towers of Hanoi"), is a puzzle invented by E. Lucas in 1883.It is also known as the Tower of Brahma puzzle and appeared as an intelligence test for apes in the film Rise of the Planet of the Apes (2011) under the name "Lucas Tower.". That means that we can reuse the space after finishing the first one. Alright, we have found our terminal state point where we move our disk to the destination like this: Now we call our function again by passing these arguments. Hanoi Tower Math 4. Solving Tower of Hanoi Iteratively. ¡Jugar a Tower of Hanoi Math es así de sencillo! The tower of hanoi is a mathematical puzzle. Now, the time required to move n disks is T(n). We also have thousands of freeCodeCamp study groups around the world. Itâs an asymptotic notation to represent the time complexity. If you read this far, tweet to the author to show them you care. nth disk at the bottom and 1st disk at the top. (again move all (n-1) disks from aux to dest. Play Tower of Hanoi. For the Towers of Hanoi recurrence, substituting i = n â 1 into the general form determined in Step 2 gives: T n = 1+2+4+...+2nâ2 +2nâ1T 1 = 1+2+4+...+2nâ2 +2nâ1 The second step uses the base case T 1 = 1. The number of disks can vary, the simplest format contains only three. You can make a tax-deductible donation here. These disks are stacked over one other on one of the towers in descending order of their size from â¦ It consists of three pegs mounted on a board together and consists of disks of different sizes. First, move disk 1 and disk 2 from source to aux tower i.e. $\therefore T(n) = 2^2 * T(n-2) + 2+ 1\qquad (1) $ 4 $\begingroup$ I am new to proofs and I am trying to learn mathematical induction. Hence, the Tower of Hanoi puzzle with n disks can be solved in minimum 2n−1 steps. Well, this is a fun puzzle game where the objective is to move an entire stack of disks from the source position to another position. We accomplish this by creating thousands of videos, articles, and interactive coding lessons - all freely available to the public. $\text{we get $k=n-1$}, thus putting in eq(2)$, Solve for T n? (move all n-1 disks from source to aux.). tower, refer to it as the "Colored Magnetic Tower of Hanoi" and study its properties. Assume one of the poles initially contains all of the disks placed on top of each other in pairs of decreasing size. No problem, letâs see. 2020.11.19 ãµã¤ãå ã®ã£ã©ãªã¼æ´æ°. You have 3 pegs (A, B, C) and a number of discs (usually 8) we want to move all the discs from the source peg (peg A) to a destination peg (peg B), while always making sure â¦ I hope you understand the basics about recursion. We can call these steps inside steps recursion. How to solve Tower Of Hanoi (Algorithm for solving Tower of Hanoi) 6.1. Before getting started, letâs talk about what the Tower of Hanoi problem is. The object of the game is to move all of the discs to another peg. ¡Jugar a Tower Of Hanoi es así de sencillo! $$ If we have even number of pieces 6.2. equation (2.1). \begin{cases} TowerofHanoi(n-1, source, dest, aux)\text{ //step1}\\ We are now ready to move on. Tower of Hanoi. Tower of Hanoi Solver Solves the Tower of Hanoi in the minimum number of moves. 9). Recursive solution: This method involves the use of the principles of mathematical induction and recurrence relations. Just like the above picture. The puzzle was invented by the French mathematician Edouard Lucas in 1883 and is often described as a mathematical puzzle, although solving the Tower of Hanoi doesn't require any mathematical equations at all for a human player. $\text{The above equation is identified as GP series having a common ratio $r = 2$}$ and the sum is $2^{n}-1$ This is the currently selected item. The above equation is identified as GP series having a common ratio r = 2 The above equation is identified as GP series having a common ratio r = 2 and the sum is 2n â1 2 n â 1. â´ T (n) = 2n â1 â´ T ( n) = 2 n â 1. Tweet a thanks, Learn to code for free. The Tower of Hanoi Algorithm in Data Structures is a very famous Interview Question for Beginners. To solve this problem, we need to just move that disk to dest tower in one step. To learn more, see our tips on writing great answers. Full text: Hello, I am currently investigating the explicit formula for the minimal number of moves for n amount of discs on a Tower of Hanoi problem that contains 4 posts instead of the usual 3. At first, all the disks are kept on one peg(say peg 1) with the largest peg at the bottom and the size of pegs gradually decreases to the top. In this variation of the Tower of Hanoi there are three poles in a row and 2n disks, two of each of n different sizes, where n is any positive integer. We call this a recursive method. The puzzle starts with the disks in a neat stack in ascending order of size on one rod, the smallest at the top, thus making a conical shape. The formula is T (n) = 2^n - 1, in which ânâ represents the number of discs and âT (n)â represents the minimum number of moves. Towers of Hanoi, continued. So, to find the number of moves it would take to transfer 64 disks to a new location, we would also have to know the number of moves for a 63-disk tower, a 62-disk tower, By successively solving the Towers of Hanoi puzzle with an increasing number of discs one develops an experiential, hands-on understanding of the following mathematical fact: From this article, I hope you can now understand the Tower of Hanoi puzzle and how to solve it. Let it be J. $$ As puzzles go, nobody really did it better than the monks who came up with the one we are going to learn about, the Towers of Hanoi.Besides being a really cool puzzle, it has a lot of practical (and historical!) Towers of Hanoi, continued. TowerofHanoi(n-1, aux, dest, source){ //step3} In our case, this would be our terminal state. $T(n) = 2^{n-1} * T(1) + 2^{n-2} + 2^{n-3} + ... + 2^2+2^1+1$ Next lesson. 1. \text{Move $n^{th}$ disk from source to dest}\text{ //step2}\\ $\text{Generalizing the above equation for $k^{th}$ time. It consists of three rods, and a number of disks of different sizes which can slide onto any rod. Therefore: From these patterns â eq(2) to the last one â we can say that the time complexity of this algorithm is O(2^n) or O(a^n) where a is a constant greater than 1. Below is an excerpt from page 213, in reference to number of trailing zeros in binary representation of numbers. The tower of Hanoi (commonly also known as the "towers of Hanoi"), is a puzzle invented by E. Lucas in 1883.It is also known as the Tower of Brahma puzzle and appeared as an intelligence test for apes in the film Rise of the Planet of the Apes (2011) under the name "Lucas Tower.". The Tower of Hanoi is one of the most popular puzzle of the nineteenth century. tower, refer to it as the "Colored Magnetic Tower of Hanoi" and study its properties. If you want to learn these topics in detail, here are some well-known online courses links: You can visit my data structures and algorithms repo to see my other problems solutions. \end{array} Up Next. For example, in order to complete the Tower of Hanoi with two discs you must plug 2 into the explicit formula as ânâ and therefore, the minimum amount of moves using two discs is 3. $\therefore T(n) = 2^3 * T(n-3) + 2^2 + 2^1 + 1$ Otherwise, let us denote the number of moves taken as \(T(k)\).From the code, we can see that it takes \(T(k) = 2T(k-1) + 1\).. The Tower of Hanoi (sometimes referred to as the Tower of Brahma or the End of the World Puzzle) was invented by the French mathematician, Edouard Lucas, in 1883. There is one constant time operation to move a disk from source to the destination, let this be m1. Traditionally, It consists of three poles and a number of disks of different sizes which can slide onto any poles.The puzzle starts with the disk in a neat stack in ascending order of size in one pole, the smallest at the top thus making a conical shape. Before we can get there, letâs imagine there is an intermediate point B. First, move disk 1 from source to dest tower. The Tower of Hanoi (sometimes referred to as the Tower of Brahma or the End of the World Puzzle) was invented by the French mathematician, Edouard Lucas, in 1883. $\text{Taking base condition as $T(1) = 1$ and replacing $n-k = 1$},$ $$. Again Move disk 1 from aux to source tower. In our Towers of Hanoi solution, we recurse on the largest disk to be moved. The main aim of this puzzle is to move all the disks from one tower to another tower. Algorithms affect us in our everyday life. Recursion is calling the same action from that action. Active 5 years, 9 months ago. And at last, move disk 1 to dest tower on top of 2. Now move disk 1 from dest to aux tower on top of disk 2. How many moves does it take to solve the Tower of Hanoi puzzle with k disks?. The explicit formula is much easier to use because of its ability to calculate the minimum number of moves for even the greatest number of discs, or ânâ. We are trying to build the solution using pseudocode. T he Tower of Hanoi is a puzzle game consisting of a base containing three rods, one of which contains some disks on top of each other, in ascending order of diameter.. This Non Recursive C Program makes use of an Iterative method using For Loop to solve Tower of Hanoi Problem. Tower of Hanoi â Origin of the Name 2. For the 3-peg Tower of Hanoi problem, Wood [30] has shown that the policy leading to the DP equation (2.1) is indeed optimal. Donations to freeCodeCamp go toward our education initiatives, and help pay for servers, services, and staff. $\therefore T(n) = 2^{n}-1$. How does the Tower of Hanoi Puzzle work 3. Sort by: Top Voted. Tower of Hanoi - Learning Connections Essential Skills Problem Solving - apply the strategy: solving a simpler problem * Towers of Hanoi 08/09/2015 HANOITOW CSECT USING HANOITOW,R12 r12 : base register LR R12,R15 establish base register Object of the game is to move all the disks over to Tower 3 (with your mouse). Tower of Hanoi is a mathematical puzzle which consists of three towers(or pegs) and n disks of different sizes, numbered from 1, the smallest disk, to n, the largest disk. He was inspired by a legend that tells of a Hindu temple where the pyramid puzzle might The Colored Magnetic Tower of Hanoi â the "100" solution . That is, we will write a recursive function that takes as a parameter the disk that is the largest disk in the tower we want to move. Tower of Hanoi (which also goes by other names like Tower of Brahma or The Lucas Tower), is a recreational mathematical puzzle that was publicized and popularized by the French mathematician Edouard Lucas in the year 1883. significance as we learn about recursion. Materials needed for Hanoi Tower 5. But you cannot place a larger disk onto a smaller disk. What is that? However - solving a Tower of Hanoi game with 64 disks move by move needs a long time and so one might want a solution for skipping a few billion moves. Most of the recursive programs take exponential time, and that is why it is very hard to write them iteratively. In my free time, I read books. For the generalized p-peg problem with p > 4, it still remains to establish that the policy adopted to derive the DP equation (2.2) is optimal. The formula for this theory is 2n -1, with "n" being the number of rings used. In other words, a disk can only be moved if it is the uppermost disk on a stack. We have to obtain the same stack on the third rod. The Tower of Hanoi is a classic game of logical thinking and sequential reasoning. Our job is to move this stack from source A to destination C. How do we do this? From the above table, it is clear that for n disks, the minimum number of steps required are 1 + 21 + 22 + 23 + .…. Merge sort. If we have even number of pieces 6.2. Learn to code â free 3,000-hour curriculum. So there is one rule for doing any recursive work: there must be a condition to stop that action executing. I am reading Algorithms by Robert Sedgewick. Four-Pole Tower of Hanoi: Suppose that the Tower of Hanoi problem has four poles in a row instead of three. Merge sort. The time complexity of algorithms is most commonly expressed using big O notation. 1. This puzzle was published in 1883 by French mathematician Edouard Lucas (Apr/4/1842 - Oct/3/1891), who made contributions to the field of Number Theory in the areas of Mersenne primes, Diophantine equations, and the Fibonacci sequence. \end{cases} Consider a Double Tower of Hanoi. The simplified recurrence relation from the above recursive solution is, $$ It consists of threerods, and a number of disks of different sizes which can slideonto any rod. Math: on-line math problems Dear Marie, A computer version of the Towers of Hanoi written for Macintosh Computers at Forest Lake Senior High in Forest Lake Minnesota explains that: "The familiar tower of Hanoi was invented by the French Mathematician Eduard Lucas and sold as a toy in â¦ He was inspired by a legend that tells of a Hindu temple where the pyramid puzzle might Donât worry if itâs not clear to you. Practice: Move three disks in Towers of Hanoi. Now, letâs try to build the algorithm to solve the problem. We get,}$ Every recursive algorithm can be expressed as an iterative one. Thus, an algorithm to solve the Tower of Hanoi iteratively exists. Then we need to pass source, intermediate place, and the destination so that we can understand the map which we will use to complete the job. on integers). Pseudocode is a method of writing out computer code using the English language. This video explains how to solve the Tower of Hanoi in the simplest and the most optimum solution that is available. Initially, all discs sit on the same peg in the order of their size, with the biggest disc at the bottom. In order to do so one just needs an algorithm to calculate the state (positions of all disks) of the game for a given move number. In this variation of the Tower of Hanoi there are three poles in a row and 2n disks, two of each of n different sizes, where n is any positive integer. In order to move the disks, some rules need to be followed. If we have an odd number of pieces 7. Javascript Algorithms And Data Structures Certification (300 hours). Basic proof by Mathematical Induction (Towers of Hanoi) Ask Question Asked 7 years, 9 months ago. How does the Tower of Hanoi Puzzle work 3. It consists of three pegs and a number of discs of decreasing sizes. If you take a look at those steps you can see that we were doing the same task multiple times â moving disks from one stack to another. The Tower of Hanoi is one of the most popular puzzle of the nineteenth century. You can only move the disks one at a time and you can never place a bigger disk on a smaller disk. If we have an odd number of pieces 7. Tower of Hanoi is a mathematical puzzle. â¦ A simple solution for the toy puzzle is to alternate moves between the smallest piece and a non-smallest piece. \left. The rules are:- Hence, the time complexity of the recursive solution of Tower of Hanoi is O (2n) which is exponential.

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