Programming Language

46.4K+ posts

Last Updated: 29 January 2026

Find the last digit of a given integer, handling both positive and negative numbers.For instance:For 123, the last digit is 3.For −352, the last digit is 2.Approach:Calcul...read more

C++

cpp-operator

Floating Point Default Print Format in C++

Last Updated: 29 January 2026

Floating-point output formatting in C++ controls the representation of real numbers, including precision, notation (fixed/scientific), width, and alignment during stream i...read more

C++

cpp-input-output

IO Manipulation in C++

Last Updated: 29 January 2026

I/O manipulation in C++ refers to controlling the way input is read and the output is displayed using formatting tools and stream manipulators.It helps customize how numbe...read more

C++

cpp-input-output

Sort students by marks in Java

Last Updated: 30 January 2026

The arrays roll[] and marks[] store student roll numbers and their corresponding marks. The objective is to reorder the roll numbers such that they follow the descending o...read more

Java

Meeting Maximum Guests in Java

Last Updated: 29 January 2026

Given two arrays, arr[] and dep[] representing the arrival and departure times of guests at a party, where each arrival corresponds to a departure at the same index, the g...read more

Java

Sort an Array According to Another Array in Java

Last Updated: 29 January 2026

Given two arrays of equal size, an integer array a[] and a character array b[], each character is associated with an integer at the same index.Sort the character array b[]...read more

Java

The thief problem in Java

Last Updated: 29 January 2026

Given an array arr[] and an integer K, find the maximum possible sum of any K elements.Examples:Input: arr[] = {3, 7, 2, 5, 12, 30}, K = 3 Output: 49Explanation: Pick 30, ...read more

Java

Keeping indexes after sorting in Java

Last Updated: 28 January 2026

Given an integer array, sort its elements in ascending order while retaining and displaying their original indexes, ensuring the initial positions of elements are preserve...read more

Java

Comparator Methods and Examples

Last Updated: 29 January 2026

The Comparator interface in Java is used to define custom sorting logic for objects. It allows sorting collections based on different attributes without modifying the orig...read more

Java

Design a DS for prices - duplicates allowed

Last Updated: 28 January 2026

Design a data structure that stores items with associated prices (duplicates allowed) while supporting fast insertion, lookup by price, and sorted as well as range-based r...read more

Java

Warm and Cool Image Effects in OpenCV

Last Updated: 29 January 2026

Warm and cool tones are commonly used in image processing to enhance the visual mood of an image. A warm tone adds a yellowish shade making the image look brighter and ene...read more

Python

OpenCV

Text Preprocessing in Python Using Regex

Last Updated: 28 January 2026

Text data often contains noise such as special characters, unnecessary numbers or irrelevant symbols. To extract meaningful information, preprocessing is required. Python ...read more

Python

Design a DS for item prices in Java

Last Updated: 29 January 2026

Given a collection of items with their corresponding prices, design a data structure that efficiently supports the following operations:add(price, item): Adds a new item a...read more

Java

Ceiling on right in Java

Last Updated: 28 January 2026

Given an integer array, the goal is to find the ceiling on the right for each element - the smallest number greater than or equal to it that appears after it. If no such n...read more

Java

Design DS for balance in Java

Last Updated: 28 January 2026

Design a data structure to store user IDs and their corresponding balances in an e-Wallet system. The data structure must support insertion, update, and retrieval of balan...read more

Java

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