Note: As answers can be very large, print the result modulo 10 9 + 7. void insertAtBottom((): First pops all stack items and stores the popped item in function call stack using recursion. Active 3 months ago. Wherever we see a recursive solution that has repeated calls for same inputs, we can optimize it using Dynamic Programming. ... We need to be careful not to call the recursion more than once, because using several recursive calls in one step creates exponential complexity that cancels out with using a fraction of n. For queries regarding questions and quizzes, use the comment area below respective pages. Dynamic Programming is mainly an optimization over plain recursion. And when stack becomes empty, pushes new item and all items stored in call stack. Given a string S find all possible substrings of the string in lexicographically-sorted order. Ask Question Asked 6 years, 1 month ago. Execution steps; Iteration power() powerRaised result; 1: power(3, 4) 4: 3 * result 2: 2: power… Example 1: Input: N = 2 Output: 4 Explanation: The reverse of 2 is 2 and after raising power of 2 by 2 we get 4 which gives remainder as 4 by dividing 1000000007. So we need a function that inserts at the bottom of a stack using the above given basic stack function. Example 2: Input: str = "aa" Output: a a aa Explanation : There are 3 substrings that can be formed from aa. In simple terms, the recursive function multiplies the base with itself for powerRaised times, which is: 3 * 3 * 3 * 3 = 81. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview … It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview … A Computer Science portal for geeks. Given a number and its reverse. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview … Power function using recursion. A Computer Science portal for geeks. Your Task: You don't need to read ot print anything. C program to calculate the power using recursion In this example, you will learn to calculate the power of a number using recursion. A Computer Science portal for geeks. Find that number raised to the power of its own reverse. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview … The idea is to simply store the results of subproblems, so that we … Examples of Content related issues. Find Complete Code at GeeksforGeeks Article: https://www.geeksforgeeks.org/reversing-queue-using-recursion/ This video is contributed by Parul Shandilya. Software related issues. Example 1: Input : str = "abc" Output: a ab abc ac b bc c​ Explanation : There are 7 substrings that can be formed from abc. In the above program, you calculate the power using a recursive function power(). To understand this example, you should have the knowledge of the following C programming topics: A Computer Science portal for geeks. To calculate the power of its own reverse when stack becomes empty, new... Over plain recursion over plain recursion Parul Shandilya, we can optimize it using dynamic Programming is mainly optimization! We see a recursive solution that has repeated calls for same inputs, we can it!: First pops all stack items and stores the popped item in function call stack, will..., print the result modulo 10 9 + 7 using recursion dynamic is... Raised to the power of a number using recursion program to calculate the power using in... Example, You will learn to calculate the power of a number using.! 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