Topic: hashing-problem / Level: advanced

• 2101. Create a program to find the longest sequence of increasing characters in a string using hashing.
• 2102. Write a function to find the total number of unique triplets in an array that sum to a specific target using hashing.
• 2103. Given two strings, implement a function to check if they can be made equal by rearranging characters using hashing.
• 2104. Create a program to count the total number of distinct palindromes in a string using hashing.
• 2105. Write a function to find the longest substring that is a valid permutation of another string using hashing.
• 2106. Implement a program to check if a string can be segmented into valid words using hashing.
• 2107. Create a function to find the first unique character in a string using a hash map.
• 2108. Write a function to count the occurrences of each character in a string using a hash map.
• 2109. Given a string, implement a function to find the longest substring that can be formed by rearranging characters using hashing.
• 2110. Create a program to find the total number of unique words in a paragraph using hashing.
• 2111. Write a function to check if two strings can be transformed into one another with a single character change using hashing.
• 2112. Implement a program to find the longest substring that contains all distinct characters using hashing.
• 2113. Create a function to determine the number of valid words that can be formed from a list of characters using a hash map.
• 2114. Given two arrays, write a program to check if they are permutations of each other using hashing.
• 2115. Write a function to find the longest sequence of increasing integers in an array using hashing.
• 2116. Create a program to find the maximum frequency of any character in a string using a hash map.
• 2117. Implement a function to check if a string can be rearranged to form a valid word using hashing.
• 2118. Given a string, write a program to find the longest substring that contains exactly one repeating character using hashing.
• 2119. Write a function to count the occurrences of each digit in a number using hashing.
• 2120. Create a program to check if a string can be rearranged to form a valid palindrome using hashing.
• 2121. Implement a function to find the total number of vowels and consonants in a string using hashing.
• 2122. Given a list of integers, write a program to find the count of unique elements using hashing.
• 2123. Write a function to check if two strings can be made identical by rearranging characters using hashing.
• 2124. Create a program to find the maximum product of three numbers in an array using hashing.
• 2125. Implement a function to count the number of valid combinations of parentheses using hashing.
• 2126. Given a string, write a program to check if it is a valid identifier using hashing.
• 2127. Write a function to find the frequency of elements in a list using a hash map.
• 2128. Create a program to check if a string can be rearranged to form a valid word using hashing.
• 2129. Implement a function to find the first unique integer in an array using a hash map.
• 2130. Given a string, write a program to count the total number of unique characters in a string using hashing.
• 2131. Write a function to find the longest substring that is an anagram of another substring using hashing.
• 2132. Create a program to check if two arrays contain the same elements using hashing.
• 2133. Implement a function to find the maximum frequency of any digit in a number using a hash map.
• 2134. Given a string, write a program to find the longest substring that contains the same character using hashing.
• 2135. Write a function to determine if two strings can be transformed into another string using hashing.
• 2136. Create a program to count the occurrences of each letter in a string using a hash map.
• 2137. Implement a function to find the total number of unique words in a paragraph using hashing.
• 2138. Given a string, write a program to check if it can be transformed into a palindrome using hashing.
• 2139. Write a function to find the frequency of each digit in a number using hashing.
• 2140. Create a program to check if two strings are isomorphic using hashing.
• 2141. Implement a function to find the longest consecutive sequence of characters in a string using hashing.
• 2142. Given a list of integers, write a program to count the total number of odd numbers using a hash set.
• 2143. Write a function to find the maximum frequency of any character in a string using a hash map.
• 2144. Create a program to find the longest substring with exactly k distinct characters using hashing.
• 2145. Implement a function to check if two strings can be transformed into another string using hashing.
• 2146. Given a string, write a program to find the total number of unique characters in a string using hashing.
• 2147. Write a function to find the longest substring that is a palindrome using hashing.
• 2148. Create a program to check if two strings can be rearranged to form a valid palindrome using hashing.
• 2149. Implement a function to count the occurrences of each character in a string using a hash map.
• 2150. Given two strings, write a program to find the longest common substring using a hash table.

• More Levels

• Beginner
• Intermediate