Server Side Programming Articles - Page 1986 of 2650

The universally unique identifier is a 32 bit hexadecimal number that can guarantee a unique value in a given namespace. This helps in tracking down objects created by a program or where ever python needs to handle object or data that needs large value of identifier. The UUID class defines functions that can create these values.Syntaxuuid3(namespace, string) uuid3 usesMD5 hash value to create the identifier. Uuid5(namespace, string) Uuid5 uses SHA-1 hash value to create the identifier. The namespace can be – NAMESPACE_DNS : Used when name string is fully qualified domain name. NAMESPACE_URL : Used when name string is ... Read More

Problem statementGiven an array and two numbers M and K. We need to find sum of max M subarrays of size K (non-overlapping) in the array. (Order of array remains unchanged). K is the size of subarrays and M is the count of subarray. It may be assumed that size of array is more than m*k. If total array size is not multiple of k, then we can take partial last array.ExampleIf Given array is = {2, 10, 7, 18, 5, 33, 0}. N = 7, M = 3 and K = 1 then output will be 61 as subset ... Read More

Problem statementGiven a list of permutations of any word. Find the missing permutation from the list of permutations.ExampleIf permutation is = { “ABC”, “ACB”, “BAC”, “BCA”} then missing permutations are {“CBA” and “CAB”}AlgorithmCreate a set of all given stringsAnd one more set of all permutationsReturn difference between two setsExample Live Demo#include using namespace std; void findMissingPermutation(string givenPermutation[], size_t permutationSize) {    vector permutations;    string input = givenPermutation[0];    permutations.push_back(input);    while (true) {       string p = permutations.back();       next_permutation(p.begin(), p.end());       if (p == permutations.front())          break;     ... Read More

Problem statementGiven two integer arrays even [] and odd [] which contains consecutive even and odd elements respectively with one element missing from each of the arrays. The task is to find the missing elements.ExampleIf even[] = {10, 8, 6, 16, 12} and odd[] = {3, 9, 13, 7, 11} then missing number from even array is 14 and from odd array is 5.AlgorithmStore the minimum and the maximum even elements from the even[] array in variables minEven and maxEvenSum of first N even numbers is N * (N + 1). Calculate sum of even numbers from 2 to minEven ... Read More

Problem statementGiven a Tree where every node contains variable number of children, convert the tree to its mirrorExampleIf n-ary tree is −Then it’s mirror is −Example Live Demo#include using namespace std; struct node {    int data;    vectorchild; }; node *newNode(int x) {    node *temp = new node;    temp->data = x;    return temp; } void mirrorTree(node * root) {    if (root == NULL) {       return;    }    int n = root->child.size();    if (n < 2) {       return;    }    for (int i = 0; i < ... Read More

Problem statementGiven an array of integers. Find the pair in an array which has minimum XOR valueExampleIf arr[] = {10, 20, 30, 40} then minimum value pair will be 20 and 30 as (20 ^ 30) = 10. (10 ^ 20) = 30 (10 ^ 30) = 20 (10 ^ 40) = 34 (20 ^ 30) = 10 (20 ^ 40) = 60 (30 ^ 40) = 54AlgorithmGenerate all pairs of given array and compute XOR their valuesReturn minimum XOR valueExample Live Demo#include using namespace std; int getMinValue(int *arr, int n) {    int minValue = INT_MAX;    for (int i = 0; i < n; ++i) {       for (int j = i + 1; j < n; ++j) {          minValue = min(minValue, arr[i] ^ arr[j]);       }    }    return minValue; } int main() {    int arr[] = {10, 20, 30, 40};    int n = sizeof(arr) / sizeof(arr[0]);    cout

Problem statementGiven two integer p and q, the task is to find the minimum possible number x such that q % x = 0 and x % p = 0. If the conditions aren’t true for any number, then print -1.ExampleIf p = 3 and q = 66 then answer is 3 as: 66 % 3 = 0 3 % 3 = 0AlgorithmIf a number x satisfies the given condition, then it’s obvious that q will be divided by p i.e. q % p = 0 because x is a multiple of p and q is a multiple of xSo ... Read More

Problem statementGiven a array of n positive elements we need to find the lowest possible sum of max and min elements in a subarray given that size of subarray should be greater than equal to 2.ExampleIf arr[] = {10, 5, 15, 7, 2, 1, 3} then sum of “max + min” is 3 when we add “2 + 1”.AlgorithmAdding any element to a subarray would not increase sum of maximum and minimum.Since the max of an array will never decrease on adding elements to the array. It will only increase if we add larger elements. So it is always optimal ... Read More

Problem statementGiven an array of integers, the task is to find the AND of all elements of each subset of the array and print the minimum AND value among all those.ExampleIf arr[] = {1, 2, 3, 4, 5} then (1 & 2) = 0 (1 & 3) = 1 (1 & 4) = 0 (1 & 5) = 1 (2 & 3) = 2 (2 & 4) = 0 (2 & 5) = 0 (3 & 4) = 0 (3 & 5) = 1 (4 & 5) = 4AlgorithmThe minimum AND value of any subset of the array will be ... Read More

Problem statementGiven an array of n integers containing only 0 and 1. Find the minimum toggles (switch from 0 to 1 or vice-versa) required such the array the array become partitioned, i.e., it has first 0s then 1s.ExampleIf arr[] = {1, 0, 0, 1, 1, 1, 0} then 2 toggle is required i.e. toggle first one and last zero.AlgorithmIf we observe the question, then we will find that there will definitely exist a point from 0 to n-1 where all elements left to that point should contains all 0’s and right to point should contains all 1’sThose indices which don’t ... Read More