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C++ Articles
Page 231 of 597
Print Concatenation of Zig-Zag String in n Rows in C++
In this problem, we are given a string that is a sequence of characters. And we are given the length of the zig-zag pattern and we have to print the concatenation string of this zig-zag string in n rows.Let’s see a few examples to understand the concept better, EXAMPLEInput : string = ‘STUVWXYZ’ n = 2. Output : SUWYTVXZExplanation − the zig-zag pattern for the string for a 2-row pattern is −S U W Y T V X ZThe concatenation of this zig-zag pattern is - SUWYTVXZ.ExampleInput : string = ABCDEFGH n = ...
Read MorePrint bitwise AND set of a number N in C++
In this problem, we have to print all the numbers from 0 to n which are Bitwise AND of a binary of n.Let’s take an example to understand the concept better.Input : N = 4. Output : 0 4 Explanation : 0 & 4 = 0 1 & 4 = 0 2 & 4 = 0 3 & 4 = 0 4 & 4 = 4. Input : N = 6 Output : 0, 2, 4, 6To solve this problem, we need to use bitwise operators. Using these we will find the required subsets. We ...
Read MorePrint array of strings in sorted order without copying one string into another in C++
In the problem to print an array of strings in sorted order without copying one string into another, we need to sort the array of string. Here the programmer cannot copy a string into another string while sorting.Let’s take an example to understand the concept better :Example −Input : {“Delhi”, “Hyderabad”, “Indore”, “Mumbai”, “Banglore”} Output : Banglore, Delhi, Hyderabad, Indore, MumbaiExplanation − Lexicographically the ordering is done. So, Bangalore starting with B comes first and Mumbai starting with M comes last.Now, let's try to derive a solution to our problem.To solve the problem, we can create an array that stores the ...
Read MorePrint calendar for a given year in C++
In this problem, we are given a year and we want to print the calendar for that year.The year calendar shows all days, months on every date of the month. And here we will create a program that will return the calendar of the current year.For this, we will need some calculations like, Number of days in a specific monthJanuary, March, May, July, August, October, December has 31 days.February has 28 days in a nonleap year and 29 days in a leap year.April, June, September, November has 30 days.Start Day (weekday) on the monthBased on the year and month, the ...
Read MoreFind a palindromic string B such that given String A is a subsequence of B in C++
Suppose we have a string A, we have to find another string B, that will be palindrome. And the given string A will be subsequence of B. The subsequence of a string is a string that can be formed by it by deleting some characters without changing the order of remaining characters. Suppose the string is “cotst”, then generated string will be “contest”. For the input of this program we have chosen A = “ab”, the generated string will be “abba”, this is palindrome.To solve this, we will follow this approach. This is very simple, we will reverse the A, ...
Read MorePrint Binary Tree levels in sorted order in C++
In this problem, we are given a binary tree and we have to print all nodes at a level in sorted order of their values.Let’s take an example to understand the concept better, Input −Output −20 6 15 2 17 32 78To solve this problem, we need to print a sorted order of each level of the tree. For this, we need to create a queue and two priority queues. The NULL separator is used to separate two levels.ExampleProgram to illustrate the logic −#include #include #include using namespace std; struct Node { int data; struct Node ...
Read MoreFind a specific pair in Matrix in C++
Suppose there is an n x n matrix mat of integers. we have to find maximum value of mat(c, d) - mat(a, b) over all choices of indexes. Here we have to keep in mind that c > a and d > b. So if the matrix is like −12-1-4-20-8-342138613-4-117-60-410-51The output will be 18. This is because mat[4, 2] - mat[1, 0] = 18 has maximum difference.To solve this we will preprocess the matrix such that index(i, j) stores max of elements in matrix from (i, j) to (n - 1, n - 1) and in the process keeps on ...
Read MorePrint Binary Tree in 2-Dimensions in C++
In this problem, we are given a binary tree and we have to print it two dimensional plane.Binary Tree is a special tree whose every node has at max two child nodes. So, every node is either a leaf node or has one or two child nodes.Example, Let’s take an example to understand the topic better −Output - 7 4 5 1 3 8Now as we have seen in the example, the nodes of the tree are printed in a 2-D output screen horizontally.Here, we have flipped the tree by ...
Read MorePrint array elements in alternatively increasing and decreasing order in C++
In this problem, we are given an array of number and we have to print the elements of the array in alternatively increasing and decreasing order while printing. The alternative order will be in such a way that 1st two elements are in increasing order and then the next three elements are in decreasing order again next four are in ascending order.Let’s take an example to understand the problem better, Input : {1, 4, 0, 2, 7, 9, 3} Output : 0 1 9 7 4 2 3Explanation − the array in increasing order of elements is 0 1 ...
Read MorePrint array elements that are divisible by at-least one other in C++
In this problem, we are given an array of integers and we have to print only those numbers that are divisible by at least one other element of the array.Let’s take an example to understand the concept better, Input : 3 12 16 21 Output : 12 21Explanation − 3 is the smallest so it can be divisible by any other number are 12 which is divisible by 3, 16 not divisible by 3 and then 21 which is divisible by 3. So, we will neglect 3 and 16.One easy way is to check if all elements are divisible ...
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