Programming Articles - Page 2148 of 3363

In this problem, we are given an array of unique integers and a sum. And we have to find the triplets which can form the same sum.Let's take an example to solve the problem −Input : array = {0 , 2 , -1 , 1, -2} Sum = 1 Output : 1 2 -2 0 2 -1To solve this problem, we will be finding all the triplets that provide the sum. A simple approach will be using three loops and finding the sum of the elements and return the adequate triplet.Example Live Demo#include using namespace std; void Triplets(int arr[], int ... Read More

More is a command to view (but not modify) the contents of a text file, one screen at a time. It is available on Unix and Unix-like systems, DOS, OS/2, and Microsoft Windows. Programs of this sort are called pagers. More is a very basic pager, originally allowing only forward navigation through a file, though newer implementations which allows for limited backward movement.The basics of more command should be like this –$ more /var/log/dkpg.logThe sample output should be like this –2016-12-02 11:30:45 startup archives unpack 2016-12-02 11:30:45 install python-ptyprocess:all 0.5-1 2016-12-02 11:30:45 status half-installed python-ptyprocess:all 0.5-1 2016-12-02 11:30:45 status ... Read More

IntConsumer interface is a functional interface from java.util.function package in Java 8. This interface accepts a single int-valued argument as input but doesn't produce any output. Since it is a functional interface, it can be used as an assignment target for a lambda expression or method reference. It contains one abstract method: accept() and one default method: andThen().Syntax@FunctionalInterface public interface IntConsumer {    void accept(int value); }Example of Lambda Expressionimport java.util.function.IntConsumer; public class IntConsumerTest1 {    public static void main(String[] args) {       IntConsumer displayNextInt = i -> System.out.println("Next Int Value: " + (i+1));  // lambda       IntConsumer displaySquare = ... Read More

The "this" and "super" references within a lambda expression are the same as in the enclosing context. Since the lambda expression doesn't define a new scope, "this" keyword within a lambda expression signifies "this" parameter of a method where the lambda expression is residing.In the below example, this.toString() calls the toString() method of the LambdaTest object but not the toString() method of the Operate instance.Example@FunctionalInterface interface Operate {    int func(int num1, int num2);    public String toString(); } public class LambdaTest {    public static void main(String[] args) {       LambdaTest test = new LambdaTest();       test.getResult();    } ... Read More

In this problem, we are given an array of integers and an integer sum and we have to print all pairs of integers whose sum is equal to the sum value.Let’s take an example to understand the problem :Input − array = {1, 6, -2, 3} sum = 4Output − (1, 3) , (6, -2)Here, we need pairs with the given sum value.A simple solution to the problem will be checking pairs of elements that generate the sum. This can be done by traversing array and find the number in array that sums up to sum value.ExampleThis program will illustrate ... Read More

In this problem, we are given a string and we have to print all the palindromic permutations that are possible from the characters of that string.Let’s take an example to understand the problem −Input − string = ‘aabb’Output − abba baabTo solve this problem we have to take the characters of the string and one by one generate all palindrome strings using these characters.Step 1 − Check if the string is a palindrome or not, print ‘Not Possible’ if not.Step 2 − If it can make palindrome, then make it into half and lexicographically select each letter of string.Step 3 ... Read More

In this problem, we are given a palindromic string. And we have to print all the partitions of this string. In this problem, we will find all possible palindrome partitions of the string by cutting it.Let’s take an example to understand the problem -Input − string = ‘ababa’Output − ababa , a bab a, a b a b a ….The solution, to this problem, is to check if a substring is a palindrome or not. And print the substring if it is substring.ExampleThe below program will illustrate the solution − Live Demo#include using namespace std; bool isPalindrome(string str, int low, int ... Read More

In this problem, we are given a matix which contains aplhabets (lowercase only) and we have to print all palidromic paths in the given matrix from top left to bottom right of the matrix.Allowed moves in this problem are right and down. Diagonal moves are not allowed.Let’s take an example to understand the problem −Input: matrix[][] ={    {"xxxy",    "yxxx",    "xyyx"} Output: xxxxxx , xxxxxx , xyxxyxExplainationLets see all valid moves from top left to bottom right using the position wrt to ith position.i00 -> i01 -> i02 -> i03 -> i13 -> i23 = xxxyxx i00 -> ... Read More

We have to find the number of permutations of 1 to n, so the prime numbers are placed at prime indices. The answers may be large, return the answer modulo 10^9 + 7. So if n = 5, then output will be 12. So there will be 12 permutations. one possible permutation will be [1, 2, 5, 4, 3], one invalid permutation is [5, 2, 3, 4, 1] because 5 is placed at index 1, that is not prime.To solve this, we will follow these steps −Define one method called getNum, as follows −prime := list of all primes from ... Read More

In this problem we are given a directed graph and we have to print all paths from the source to the destination of the graph using Breadth first Search (BFS).Directed graph is a graph in with edges that are directed from vertex a to b.Let’s take an example to understand the problem -Source = K destination = POutputK -> T -> Y -> A -> P K -> T -> Y -> P K -> A -> PHere, we have found paths from K to P. We have traversed paths and printed all paths from K that direct us to P.To ... Read More