💡 Problem Formulation: Imagine you have a list of different room capacities and a particular size of a group that needs accommodation. Your goal is to find the first room from the list that can fit the group based on its capacity. For instance, if you have a list of room sizes [10, 50, 20, … Read more
💡 Problem Formulation: A local peak element in a list of numbers is an element that is not smaller than its neighbors. For an element at index i, this implies that list[i] >= list[i-1] and list[i] >= list[i+1]. The goal is to find all indices of such local peak elements. For instance, given the list … Read more
💡 Problem Formulation: We are tasked with determining whether a given array can be rearranged such that the difference between each pair of adjacent elements is the same. This is particularly useful in applications where equidistant data points are necessary. For example, given an array [3, 5, 1, 4, 2], the solution should allow us … Read more
💡 Problem Formulation: The challenge is to compute the maximum sum of any subarray, then take its modulus by a given number m. For example, given an array [3, 3, 9, 9, 5] and m = 7, the maximum sum of a subarray modulo m is 6 which comes from the subarray [3, 3] where … Read more
💡 Problem Formulation: In many applications involving text processing, it’s essential to determine the number of distinct substrings that a given string can produce. This task becomes more challenging when addressing different queries, perhaps in a dynamic programming or database context. For example, given the input string “aab”, we might want to know the number … Read more
💡 Problem Formulation: Sometimes, we need an efficient way to determine the smallest number of elements that need to be added to a given set to reach a specified target sum. Imagine you have an array [1, 2, 3] and your target sum is 7. The minimal element additions needed would be [3, 1], which … Read more
💡 Problem Formulation: Given a digit list representing a non-negative integer, we want to add one to the integer and return the resulting number as a digit list. For example, if the input is [1, 2, 3], which represents the number 123, after adding one, the output should be [1, 2, 4]. Method 1: Iterative … Read more
💡 Problem Formulation: Imagine you have an e-commerce platform and you want to determine the number of additional 5-star reviews needed to achieve a target average rating. Given the current number of 5-star reviews and the total reviews along with the desired threshold percentage, the goal is to calculate the minimum additional 5-star reviews required. … Read more
💡 Problem Formulation: The task is to count the occurrences of substring patterns within a given string or set of strings based on varied queries. For instance, if given the string ‘ababa’ and queries like ‘aba’ or ‘bab’, the program would output the counts of these substrings in the original string – which would be … Read more
💡 Problem Formulation: In programming challenges, you may encounter scenarios where you are given two strings containing lowercase alphabetic characters, and you’re required to merge them into the lexicographically smallest string possible. For example, given “ace” and “bdf”, the optimal output would be “abcdef”. This article explores five diverse methods to solve this problem using … Read more
💡 Problem Formulation: In computational problems related to pathfinding or optimization, one might need to determine the minimum number of steps required to reach a destination point when there are varying step sizes. In this article, we solve the problem of finding the optimal number of steps to reach a destination using a combination of … Read more
💡 Problem Formulation: Sorting an array is a fundamental task in programming. Specifically, we are interested in the process of sorting an array using insertion sort algorithm in Python, where we quantify the efficiency of sorting by counting the number of shifts performed. For an unsorted array like [4, 3, 2, 1], we aim to … Read more