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Articles by sudhir sharma
Page 60 of 98
Print all possible paths from top left to bottom right of a mXn matrix in C++
In this problem, we are given an mXn 2D matrix and we have to print all possible paths from top left to the bottom right of the matrix. For traversal, we can move only right and down in the matrix.Let’s take an example to understand the topic better −Input: 1 3 5 2 8 9 Output: 1 -> 3 -> 5 -> 9 1 -> 3 -> 8 -> 9 1 -> 2 -> 8 -> 9To solve this problem, we will move from one cell to another and print the path on going down and right. We will do ...
Read MorePrint all valid words that are possible using Characters of Array in C++
Ib this problem, we are given a set of words and an array of character and we have to check if the words are possible using the characters of the array.Let’s take an example to understand the problem better −Input : words[] : {‘go’ , ‘hi’ , ‘run’ , ‘on’ , ‘hog’ , ‘gone’} Char[] : {‘a’ , ‘o’ , ‘h’ , ‘g’} Output : go , hog.Explanation − Out of the words, the words that contain the given characters are - go, hog and rest don’t include characters in the char array.To solve this problem, we will use ...
Read MorePrint all possible expressions that evaluate to a target in C++
In this problem, we are given a string of integers from 0 to 9 and a target value. We have to print out ways in which we can generate expression using +, -, and * operation which is evaluated to the value equal to target.Let’s take an example to understand the topic better −Input: string = “123” , target= 6 Output: { “1+2+3”, “1*2*3” }To solve this problem, we will be creating expressions by placing all possible binary operators between digits and then checking the result of the expression with the target value.We will pass all values to a recursive ...
Read MorePrint all possible combinations of r elements in a given array of size n in C++
In this problem, we are given an array of size n and a positive integer r. Our task is to print all possible combinations of the elements of the array of size r.Let’s take an example to understand the problem −Input: {5, 6, 7, 8} ; r = 3 Output : {5, 6, 7}, {5, 6, 8}, {5, 7, 8}, {6, 7, 8}To solve this problem an approach would be fixing elements and then recuring or looping over others to find all combinations. In this, we have to fix first n-r+1 elements only and loop or recur over the rest.Example#include ...
Read MorePrint all pairs of anagrams in a given array of strings in C++
In this problem, we are given an array of strings and we have to print all pairs of anagrams of that given array.Anagrams are strings that are formed by rearranging the character of another string. Like − hello and lolheLet’s take an example to understand the problem −Input: array = {“hello”, “hrdef”, “from”, “lohel”, “morf”}. Output: [hello, lohel] , [from , morf]To solve this problem, we will use the nesting of loops. We need two nested loops, the outer loop will traverse over the array and select elements. The nested loop will check each of the string and check if ...
Read MorePrint all pairs in an unsorted array with equal sum in C++
In this problem, we have an unsorted array and we have to print all pairs within this array that have an equal sum.Let’s take an example to understand the problem −Input: array = [12, 13, 20, 5] Output: [12, 13] and [20, 5] have sum 25.To solve this problem, we will have to find pairs of the same sum. For this, we will check pairs for the same sum. And to avoid duplicate pairs, we will use the map.For this, we will need two maps, one to store all sum pairs and their sum and others to store all sum ...
Read MorePrint all numbers whose set of prime factors is a subset of the set of the prime factors of X in C++
In this problem, we are given a set of N numbers and a number X. And we have to print all numbers from the array whose set of prime factors is a subset of the set of prime factors of X.Let’s take an example to understand the problemInput: X= 30 , array = {2, 3, 6, 10, 12} Output : 2 3 6To solve this problem, we have to traverse elements of the array. And divide this element with gcd of (element, x). Repeat division till the gcd becomes 1. And print the remaining number.Example#include using namespace std; void ...
Read MorePrint all numbers less than N with at-most 2 unique digits in C++
In this problem, we are given an integer N and we have printed all the number less than N with at-most 2 unique digits i.e. maximum 2 different digits can be used to create the number.Let’s take an example to understand the problem −Input: N = 17 Output: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16To solve this problem, we will be generating all numbers that have only two unique digits. Our number generating process starts from 0 and ends when our number is equal to or greater than N. For two ...
Read MorePrint all nodes less than a value x in a Min Heap in C++
In this problem, we are given a Min Heap and a value x and we have to print all nodes less than x.Min heap is a special type of binary tree in which every node has a value less than the node value of its child node.Let’s take an example to understand the problem −X = 45Output − 2 4 7 10 17 22 33 34Now, to solve this problem we need to do pre-order traversal of the whole min-heap and print only those values which are less than the given value X. If a value of a node is ...
Read MorePrint all nodes in a binary tree having K leaves in C++
In this problem, we are given a binary tree and an integer K and we have to print all nodes of the binary tree that have K leaves in their child subtree.The binary tree is a special tree whose each node has at max two nodes (one/two/none).The leaf node of a binary tree is the node at end of the tree.Let’s take an example to understand the problem −K = 2Output − {S}To solve this problem, we will do traversal (postorder) for the tree. Now, we will see each left subtree and right subtree if the sum of leaves is ...
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