Topic: language-problem / Level: intermediate

• 1102. Write a program to find the first missing positive integer in an unsorted array.
• 1103. Write a program to implement a basic ticket booking system using structures.
• 1104. Write a program to calculate the sum of two matrices.
• 1105. Write a program to implement a simple hash table with collision resolution.
• 1106. Write a program to check if two strings are anagrams using character counting.
• 1107. Write a program to find the longest increasing subsequence in an array.
• 1108. Write a program to sort an array using the merge sort algorithm.
• 1109. Write a program to find the median of two sorted arrays.
• 1110. Write a program to implement a simple contact management system with search functionality.
• 1111. Write a program to check if a number is a palindrome without using string functions.
• 1112. Write a program to find the number of occurrences of each word in a string.
• 1113. Write a program to implement a basic queue using linked lists.
• 1114. Write a program to find the largest product of two numbers in an array.
• 1115. Write a program to check if a string has balanced parentheses using a stack.
• 1116. Write a program to implement a basic online shopping application.
• 1117. Write a program to calculate the Fibonacci number at position n using dynamic programming.
• 1118. Write a program to find the first duplicate character in a string.
• 1119. Write a program to implement a simple version of the game Hangman.
• 1120. Write a program to find the frequency of elements in an array.
• 1121. Write a program to calculate the total marks of students and find the average.
• 1122. Write a program to check if a string is a valid hexadecimal color code.
• 1123. Write a program to find the longest palindrome substring in a string.
• 1124. Write a program to implement a simple text-based game with multiple levels.
• 1125. Write a program to find the smallest prime factor of a number using trial division.
• 1126. Write a program to sort an array of strings in alphabetical order.
• 1127. Write a program to implement a basic memory management simulation.
• 1128. Write a program to calculate the surface area of a cone.
• 1129. Write a program to check if a given string is a valid Roman numeral.
• 1130. Write a program to find the longest common prefix of an array of strings.
• 1131. Write a program to implement a simple online quiz application with scoring.
• 1132. Write a program to check if a number is an abundant number.
• 1133. Write a program to find the maximum length of a substring with all distinct characters.
• 1134. Write a program to implement a simple health tracking application.
• 1135. Write a program to calculate the average of grades using weighted average.
• 1136. Write a program to check if two strings can be converted to each other by a limited number of swaps.
• 1137. Write a program to find the product of all elements in an array using a function.
• 1138. Write a program to implement a simple event scheduling application.
• 1139. Write a program to find the minimum number of coins needed to make a given amount.
• 1140. Write a program to check if a number is a happy number using a function.
• 1141. Write a program to implement a basic library management system.
• 1142. Write a program to find the longest substring that contains at most two distinct characters.
• 1143. Write a program to check if a string is a valid password according to certain rules.
• 1144. Write a program to implement a simple calculator that can perform basic arithmetic operations.
• 1145. Write a program to find the total number of words in a text file.
• 1146. Write a program to check if two numbers are co-prime.
• 1147. Write a program to implement a simple to-do list application with priorities.
• 1148. Write a program to find the greatest common divisor (GCD) of two numbers using recursion.
• 1149. Write a program to check if a string is a valid date in the format MM/DD/YYYY.
• 1150. Write a program to calculate the total distance between multiple points in a 2D plane.
• 1151. Write a program to implement a basic note-taking application with categories.

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