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Programming Articles
Page 1393 of 2547
Place k elements such that minimum distance is maximized in C++
In this problem, we are given an array of n points that lie on the same line. Our task is to place k elements of the array in such a way that the minimum distance between them is maximized.Let’s take an example to understand the problem, Input − array = {}Output −To solve this problem, we will find have to find the maximum possible minimum distance. For such a problem first, we need to sort the given array and then do a binary search until we get the solution at mid.ExampleProgram to show the implementation of our solution, #include ...
Read MoreRotate Function in C++
Suppose we have Given an array of integers A and let n is the length of array A. Now assume Bk to be an array obtained by rotating the array A, k positions clock-wise. Here the rotation can be defined as −F(k) = 0 * Bk[0] + 1 * Bk[1] + ... + (n-1) * Bk[n-1].Now find the maximum value of F(0), F(1), ..., F(n-1).So if the input is like A = [4, 3, 2, 6], then −F(0) = (0 * 4) + (1 * 3) + (2 * 2) + (3 * 6) = 0 + 3 + 4 ...
Read MoreMaximum Width of Binary Tree in C++
Suppose we have a binary tree, we have to define a function to get the maximum width of the given tree. Here the width of a tree is the maximum width among all levels. We will consider the binary tree has the same structure as a full binary tree, but some nodes are null. The width of one level is actually the length between the end-nodes (the leftmost and right most non-null nodes in the level, where the null nodes between the end-nodes are also counted for the length calculation). So if the tree is like −Then the maximum width ...
Read MoreDifferent methods to reverse a string in C/C++
In this tutorial, we will be discussing a program to understand different methods to reverse a string in C/C++.ExampleUser-defined reverse() function −#include using namespace std; //function to reverse given string void reverse_str(string& str){ int n = str.length(); for (int i = 0; i < n / 2; i++) swap(str[i], str[n - i - 1]); } int main(){ string str = "tutorialspoint"; reverse_str(str); cout
Read MoreInteger Replacement in C++
Suppose we have a positive integer n and we can do these operations as follow −If n is even, replace n with n/2.If n is odd, you can replace n with either n + 1 or n - 1.We have to find the minimum number of replacements needed for n to become 1?So if the number is 7, then the answer will be 4, as 7 → 8 → 4 → 2 → 1 or 7 → 6 → 3 → 2 → 1To solve this, we will follow these steps −ret := 0, n := xwhile n > 1if ...
Read MoreBinary Tree Pruning in C++
Suppose we have the head node root of a binary tree, where additionally every node's value is either a 0 or a 1. We have to find the same tree where every subtree not containing a 1 has been deleted. So if the tree is like −To solve this, we will follow these steps −Define a recursive method solve(), this will take the node. the method will be like −If node is null, then return nullleft of node := solve(left of node)right of node := solve(right of node)if left of node is null and right of node is also null ...
Read MoreLongest String Chain in C++
Suppose we have a list of words, here each word consists of lowercase letters. So one word word1 is a predecessor of another word word2 if and only if we can add exactly one letter anywhere in word1 to make it equal to word2. For the example of the predecessor is like, "abc" is a predecessor of "abac". Now a word chain is a sequence of words [word_1, word_2, ..., word_k] with k >= 1, where word_1 is a predecessor of word_2, word_2 is a predecessor of word_3, and so on. We have to find the longest possible length of ...
Read MorePierpont Prime in C++
In this problem, we are given a number n. Our task is to print all Pierpont prime numbers less than n.Pierpont Prime number is a special type of prime number that is of the form, p= 2i . 3k + 1.Where p is a prime number, and i and k are some integers.Let’s take an example to understand the problem, Input − n = 50Output − 2, 3, 5, 7, 13, 17, 19, 37To solve this problem, we have to find all the prime numbers that follow the condition. For this, we will find a number with factors of powers ...
Read MoreRandom Pick Index in C++
Suppose we have an array of integers with possible duplicates, we have to pick the index randomly of a given target number. We can assume that the given target number must exist in the array. So if the array is like [1, 2, 3, 3, 3], then pick(3), may return 2, 3, 4 randomly.To solve this, we will follow these steps −ret := - 1, cnt := 1for i in range 0 to size of vif v[i] = target, thenif random number mod cnt = 0, then ret = icnt := cnt + 1return retExample (C++)Let us see the following ...
Read MoreDoes C++ compiler create default constructor when we write our own?
In this tutorial, we will be discussing a program to understand if the C++ compiler creates a default constructor when we write our own.Generally, the C++ compiler uses the default constructor when no one is defined, but always uses the one defined by the user if any.Example#include using namespace std; class myInteger{ private: int value; //other functions in class }; int main(){ myInteger I1; getchar(); return 0; }OutputCompiles successfullyExample#include using namespace std; class myInteger{ private: int value; public: myInteger(int v) //user-defined constructor { value = v; ...
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