My software development journey
Given a binary search tree, how do we find the maximum and minimum elements in it? For example in the given tree, the maximum element is 8 and the minimum element is 1. This algorithm is based on the following simple observation. In a Binary search tree, the minimum element always lies on the left…
Traversal algorithms of non-linear data structures like trees are designed to visit/print all the elements in that structure. There are three main traversals of the binary tree. Namely In-order traversal Post-order traversal Pre-order traversal In addition to these, there are inverses of the above algorithms, and there is a level order traversal. In this post…
Given a binary tree how to find the height of the tree. It is defined as the number of nodes in the longest path from root to any leaf. We can assume that the height of empty tree is 0 and the height of a tree with just root node as 1. For example the…
In this post I introduce you to a competitive programming problem called Jolly jumpers. This problem is available on UVa online judge on this link. UVa site is one of the first online judge websites which listed programming problems from different competitions like ACM ICPC and IOI and allowed users to solve and submit their…
A binary search tree is a hierarchical data structure which stores data in a non-linear fashion. It supports the insertion, search and deletion operations in O( log n ) time. Take a look at the below picture. This is an example of binary search tree. The node at the top containing 5 is the root…
Given a sorted linked list, We have to delete all the duplicates in that list. For example, If we get the following list 1 -> 1 -> 2 -> 3 -> 3 -> 3 -> 4 -> 4 -> 5 The output should be 1 -> 2 -> 3 -> 4 ->5 To solve this…
Given a string, how do we reverse the words inside the string? For example if the input string is “this is a test” the output should be “test a is this”. The algorithm is simple. This can be done in two steps. The first step is to reverse the entire string. In the second step…
Given a string and a character, Write a function to remove all instances of the character and return the modified string. One easy method is to iterate through each character of the string, Once a restricted character is seen, we move all the characters appearing after it by one position. This approach involves a lot…
We all know that while executing a program, they store their data in memory. Memory can assumed as a large array of bytes. The endianness of the machine indicates in which order the data gets stored in the memory. Please refer this and this link for a detailed introduction to this topic. Here is the…
Given an array of numbers which contains all the numbers in pairs expect one element. We have to find that unique element. For example in the array [7,3,8,1,3,4,7,1,8] 4 is the unique element and all the remaining elements occur in pairs. This is actually a specific case of more generic problem discussed in the my…