Topic: language-problem / Level: intermediate

• 1852. Write a program to check if a number is a prime number using the Sieve of Eratosthenes.
• 1853. Write a program to find the maximum subarray sum using Kadane’s algorithm.
• 1854. Write a program to implement a simple text-based adventure game with quests.
• 1855. Write a program to check if a string is a valid email address format.
• 1856. Write a program to find the total number of unique characters in a string using a hash table.
• 1857. Write a program to implement a basic text file encryption utility.
• 1858. Write a program to check if a string contains balanced parentheses of different types.
• 1859. Write a program to calculate the area of a rectangle using its length and width.
• 1860. Write a program to find the longest common prefix in a set of strings.
• 1861. Write a program to implement a basic memory allocation simulator.
• 1862. Write a program to check if a number is an evil number.
• 1863. Write a program to find the longest substring without repeating characters using a sliding window.
• 1864. Write a program to implement a simple online course registration system.
• 1865. Write a program to check if a number is a palindromic number using string manipulation.
• 1866. Write a program to find the total number of words in a sentence using pointers.
• 1867. Write a program to implement a simple character counting application.
• 1868. Write a program to check if a number is a perfect square using the square root method.
• 1869. Write a program to find the total number of vowels in a string using a loop.
• 1870. Write a program to implement a basic online recipe finder application.
• 1871. Write a program to check if two strings can be rearranged to form the same string.
• 1872. Write a program to find the maximum product of three numbers in an array.
• 1873. Write a program to check if a string is a valid time in the format HH
• 1874. Write a program to implement a basic stack data structure using linked lists.
• 1875. Write a program to calculate the sum of the first n perfect cubes.
• 1876. Write a program to check if a number is a perfect number using the sum of its proper divisors.
• 1877. Write a program to implement a simple online shopping application with user login.
• 1878. Write a program to find the first unique character in a string using a hash map.
• 1879. Write a program to check if a number is a Fibonacci number using a function.
• 1880. Write a program to implement a basic online restaurant reservation system.
• 1881. Write a program to check if two strings can be made anagrams with a limited number of character changes.
• 1882. Write a program to find the longest consecutive sequence of elements in an array.
• 1883. Write a program to check if a string is a valid binary number.
• 1884. Write a program to implement a simple game of Tic-Tac-Toe.
• 1885. Write a program to find the total number of characters in a file.
• 1886. Write a program to check if a number is a strong number using a function.
• 1887. Write a program to implement a basic online quiz application with multiple-choice answers.
• 1888. Write a program to find the sum of the first n prime numbers using a sieve algorithm.
• 1889. Write a program to check if a string is a valid date in the format YYYY-MM-DD.
• 1890. Write a program to implement a simple file search application.
• 1891. Write a program to find the first non-repeating digit in a number.
• 1892. Write a program to check if two strings are equal ignoring case and punctuation.
• 1893. Write a program to calculate the average of grades entered until a sentinel value is reached.
• 1894. Write a program to implement a simple online attendance tracking system.
• 1895. Write a program to find the sum of all even numbers in a range.
• 1896. Write a program to check if a string contains balanced square brackets.
• 1897. Write a program to implement a basic memory management simulator with dynamic allocation.
• 1898. Write a program to find the longest increasing subsequence using dynamic programming.
• 1899. Write a program to check if a number is an automorphic number using a function.
• 1900. Write a program to implement a simple online reservation system for events.
• 1901. Write a program to find the total number of sentences in a text file.

• More Levels

• Beginner
• Advanced