💡 Problem Formulation: Given a binary string, the task is to write a Python program to find the total number of non-empty substrings that contain only the character ‘1’. For instance, if the input is ‘1101’, the desired output is 4 since the substrings with only 1s are ’11’, ‘1’, ‘1’, and ‘1’. Method 1: … Read more
💡 Problem Formulation: Imagine you are given a weighted graph where weights represent the probability of transitioning from one node to another. The challenge is to find the path between two nodes that has the maximum overall probability. This article will walk through five different methods to tackle this problem using Python. For instance, if … Read more
💡 Problem Formulation: In tree data structures, subtrees often represent hierarchical subsets of data. A common query might involve counting the nodes within a subtree that share a common label. For example, given a tree where each node is labelled with a letter, one might be tasked with finding the number of ‘A’-labelled nodes within … Read more
💡 Problem Formulation: In the context of array processing, a common task involves identifying subarrays whose elements sum to an odd number. Given an input array like [1, 2, 3, 4], we aim to find the count of all possible contiguous subarrays where the sum is odd. For this input, the desired output is 4, … Read more
💡 Problem Formulation: Given a string, the task is to compute the number of ‘good’ ways it can be split into two non-empty substrings, such that the number of distinct characters in both substrings is the same. For example, given the input “ababa”, a good split would result in strings “aba” and “ba” both containing … Read more
💡 Problem Formulation: In the task of converting a binary string into an alternating binary string (where each digit is the opposite of its neighbor), our goal is to find the minimum number of changes needed. Given an input like 01010, no changes are needed as it is already alternating, but for 00011, at least … Read more
💡 Problem Formulation: Given an array of integers, we want to determine if the array has been sorted in non-decreasing order and then rotated about a pivot. A rotated array means that it may start from the middle of a sorted array and continue until the end, wrapping around to the beginning of the array. … Read more
💡 Problem Formulation: Given a list of integers, the goal is to calculate the sum of only the unique elements, where “unique” refers to those elements that appear exactly once within the list. For example, if the input is [7, 3, 5, 3, 4, 5], the unique elements are [7, 4], and their sum is … Read more
💡 Problem Formulation: Given a list or array of integers where each integer represents a ball labeled with a box number, the challenge is to write a program in Python that finds the maximum number of balls in any box. For instance, if the input is [1, 2, 1, 2, 1], the desired output is … Read more
💡 Problem Formulation: You’re given a time string where some of the digits are represented by “?” and you need to find the latest valid time that can be formed by replacing these hidden digits. For example, given the input “2?:?8”, a possible output could be “23:58”. It’s important to ensure that the time constructed … Read more
Finding the Highest Altitude in Python: Multiple Methods Explored 💡 Problem Formulation: Our goal is to determine the highest altitude that a hiker reaches on a hike as given by a list of relative heights (gains or losses). For example, if we have the list of changes in altitude [1, -1, 5, -2], the highest … Read more
Calculate Number of Boxes for Godown Storage in Python 💡 Problem Formulation: You are tasked with creating a Python program to determine the exact number of boxes that can be stored in a godown. Considering the dimensions of the godown and the size of each box, the program should output the number of boxes that … Read more