In the given array of sorted integers, the task is to print the squares of every array element and print the array in sorted order. For example, Input-1 −arr[ ] = { -3, -1, 0, 1, 4, 6 };Output −{0, 1, 1, 9, 16, 36}Explanation − The squares of each of the elements of the given array [-3, -1, 0, 1, 4, 6 ] is [0, 1, 1, 9, 16, 36 ].Input-2 −arr[ ]= { 0, 1, 2, 8, 9 }Output −{0, 1, 4, 64, 81}Explanation − The squares of each of the elements of the given array [ 0, ... Read More

Given an array of 0, 1 and 2 sort the element in an order such that all the zeros come first before 1 and all the 2’s in the end. We have to sort all the elements of the array in-place.We can solve this problem using DNF (Dutch National Flag) Sorting Algorithm. For example, Input-1 −arr[ ]= {2, 0, 0, 1, 2, 1 }Output −0 0 1 1 2 2Explanation − Sorting the given array of elements containing 0, 1 and 2 using the DNF Sorting Algorithm, it will print the output as {0, 0, 1, 1, 2, 2}.Input-2 −arr[ ... Read More

Given an array of 0, 1, and 2, sort the elements in an order such that all the zeros come first before 1 and all the 2’s in the end. We have to sort all the elements of the array in-place.We can solve this problem using DNF (Dutch National Flag) Sorting Algorithm. For example, Input-1 −arr[ ]= {2, 0, 0, 1, 2, 1 }Output −0 0 1 1 2 2Explanation − Sorting the given array of elements containing 0, 1 and 2 using DNF Sorting Algorithm, it will print the output as {0, 0, 1, 1, 2, 2}.Input-2 −arr[ ]= ... Read More

Lambda Function − Lambda are functions is an inline function that doesn’t require any implementation outside the scope of the main program.Lambda Functions can also be used as a value by the variable to store. Lambda can be referred to as an object that can be called by the function (called functors).Whenever the compiler encounters a definition of the lambda function, it generally creates a custom object for the lambda.A lambda function has more functionality than a normal function, for example, it has a capturing method to capture the used variables. However, the captured variable is treated as the member ... Read More

Given a singly linked list, the task is to search a particular element in the linked list. If the element is found, then print “present” otherwise “Not present”. For example, Input-1 −1→ 2→ 3→ 4→ 5→ 6Searching for ‘7’Output −Not PresentExplanation − In the given singly linked list the element ‘7’ is not present, hence we will return the output as “Not Present”.Input-2 −1→ 2→ 3→ 4→ 5Searching for ‘2’Output −PresentExplanation − Since in the given Singly linked list the element ‘2’ is present thus we will return the output as “Present”.Approach to solve this problemThere are two approaches to ... Read More

Let’s suppose we have given a square matrix of N×N. The task is to rotate the matrix counterclockwise. For example, Input-1 −N = 3 matrix[ ][ ] = [    [1 2 3],    [4 5 6],    [7 8 9] ]Output −3 6 9 2 5 8 1 4 7Explanation: After rotating the matrix counterclockwise it will generate the output as, 3 6 9 2 5 8 1 4 7.Approach to solve this problemInitially the idea is to find the transpose of the given matrix and then swap each of the elements of the matrix while traversing row-wise.Take Input ... Read More

Given a string, the task is to reverse all the vowels present in the given string. For example, Input-1 −a = “tutor”Output −toturExplanation − Reversing the string “tutor” will generate the output as “totur.Input-2 −a = “mathematics”Output −mithametacsExplanation − Reversing the string “mathematics” will generate the output as “mithametacs”.Approach to solve this problemGiven a string, we have to reverse all the vowels present in it. There are several approaches to solve this particular problem but we have to solve this in linear time O(n).Thus, the better method to solve this problem is to use the Two-Pointer approach in which we ... Read More

Given an Integer N the task is to replace all the 0’s that appear in the number with ‘5’. However, the number with leading ‘0’ cannot be replaced with ‘5’ as it remains unchanged. For example, Input-1 −N = 1007Output −1557Explanation − The given number has 2 zeros which when replaced by ‘5’ results in the output as 1557.Input-2 −N = 00105Output −155Explanation − Since the given number starts with the leading ‘0’ which can be ignored and the output after replacing the 0 in the middle with ‘5’ results the output as 155.Approach to solve this problemTo replace all ... Read More

Given an integer N, the task is to replace all the 0’s that appear in the number with ‘5’. However, the number with leading ‘0’ cannot be replaced with ‘5’ as it remains unchanged. For example, Input-1 −N= 1007Output −1557Explanation − The given number has 2 zeros which when replaced by ‘5’ results in the output as 1557.Input-2 −N = 00105Output −155Explanation − Since the given number starts with the leading ‘0’ which can be ignored and the output after replacing the 0 in the middle with ‘5’ results the output as 155.Approach to Solve this ProblemTo replace all the ... Read More

Let us suppose we have given an array N size which consists of all the prime numbers. The task is to find the duplicates in the given array and remove them. For example, Input-1 −N = 8 arr[ ] = { 2 ,2 ,2 ,3 ,3 ,3 ,5 ,7 }Output −2 3 5 7Explanation − In the given array of prime numbers there are some duplicates of ‘2’ and ‘3’ after removing the duplicates the output will be 2 3 5 7.Input-2 −N = 5 arr[ ] = { 3, 2, 7, 5, 5}Output −3 2 7 5Explanation − In ... Read More