Constructive Algorithms - Basic Articles
Check if two strings can be made equal by swapping one character among each other
Given two strings A and B of length N, the task is to check whether the two strings can be made equal by swapping any… Read More
Constructive Algorithms
DSA
Strings
Find the number of positive integers less than or equal to N that have an odd number of digits
Given an integer N where 1 ? N ? 105, the task is to find the number of positive integers less than or equal to… Read More
Constructive Algorithms
number-digits
DSA
Mathematical
Minimum cost to convert str1 to str2 with the given operations
Given two strings of equal lengths str1 and str2 consist of characters ‘a’ and ‘b’ only. The following operations can be performed on str1:  Any… Read More
Constructive Algorithms
DSA
Greedy
Strings
Count the number of elements which are greater than any of element on right side of an array
Given an array Arr[]. The task is to count the number of elements Arr[i] in the given array such that one or more smaller elements… Read More
Constructive Algorithms
Algorithms
Arrays
C++
C++ Programs
DSA
Minimum and maximum possible length of the third side of a triangle
Given two sides of a triangle s1 and s2, the task is to find the minimum and maximum possible length of the third side of… Read More
Constructive Algorithms
DSA
Mathematical
Find out the minimum number of coins required to pay total amount
Given a total amount of N and unlimited number of coins worth 1,  10 and 25 currency coins. Find out the minimum number of coins you need to use… Read More
Constructive Algorithms
DSA
Mathematical
Divide a number into two parts
Given an integer N containing the digit 4 at least once. The task is to divide the number into two parts x1 and x2 such… Read More
Constructive Algorithms
Numbers
DSA
Greedy
Mathematical
Strings
Smallest index such that there are no 0 or 1 to its right
Given a binary array of N numbers. The task is to find the smallest index such that there are either no 1’s or 0’s to… Read More
binary-representation
Constructive Algorithms
Arrays
DSA
Mathematical
Print the balanced bracket expression using given brackets
Given four integers a, b, c and d which signifies the number of four types of brackets.   “((“ “()” “)(“ “))” The task is to… Read More
Constructive Algorithms
Competitive Programming
DSA
Mathematical
Length of the longest alternating subarray
Given an array of N including positive and negative numbers only. The task is to find the length of the longest alternating (means negative-positive-negative or… Read More
array-rearrange
Constructive Algorithms
subarray
Algorithms
Arrays
DSA
Maximize the value of A by replacing some of its digits with digits of B
Given two string A and B which represents two integers, the task is to print the maximized value of A after replacing 0 or more… Read More
Constructive Algorithms
math
Sorting Quiz
Algorithms
DSA
Strings
Maximum count of sub-strings of length K consisting of same characters
Given a string str and an integer k. The task is to count the occurrences of sub-strings of length k that consist of the same… Read More
Constructive Algorithms
substring
Algorithms
DSA
Greedy
Strings
Check if array can be divided into two sub-arrays such that their absolute difference is K
Given an array arr[] and an integer K, the task is to find whether the array can be divided into two sub-arrays such that the… Read More
Constructive Algorithms
math
subarray
Arrays
DSA
Update adjacent nodes if the current node is zero in a Singly Linked List
Given a linked list. The task is to change the value of the previous and next node of a node to 0 if the current… Read More
Constructive Algorithms
Traversal
DSA
Linked List
Count Number of animals in a zoo from given number of head and legs
Given the total number of Legs and Head of Rabbits and Pigeons. The task is to calculate the number of Rabbits and Pigeons. Examples:  Input:… Read More
Constructive Algorithms
DSA
Mathematical
School Programming
Number of groups of magnets formed from N magnets
Given N magnets are kept in a row one after another, either with a negative pole on the left and a positive pole on the… Read More
Constructive Algorithms
Algorithms
Arrays
DSA
Minimum number of digits to be removed so that no two consecutive digits are same
Given a number N. The task is to count the minimum number of digits to be removed from the number so that no two consecutive… Read More
Constructive Algorithms
number-digits
C++ Programs
Competitive Programming
DSA
Find Sum of pair from two arrays with maximum sum
Given two arrays of positive and distinct integers. The task is to find a pair from the two arrays with maximum sum. Note: The pair… Read More
Constructive Algorithms
Sorting Quiz
Technical Scripter 2018
Arrays
DSA
Number of integral solutions for equation x = b*(sumofdigits(x)^a)+c
Given a, b and c which are part of the equation x = b * ( sumdigits(x) ^ a ) + c.Where sumdigits(x) determines the… Read More
Constructive Algorithms
math
Competitive Programming
DSA
Mathematical
Check if concatenation of two strings is balanced or not
Given two bracket sequences S1 and S2 consisting of ‘(‘ and ‘)’. The task is to check if the string obtained by concatenating both the… Read More
C-String-Question
Constructive Algorithms
Bit Magic
Competitive Programming
Data Structures
DSA
Stack
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