Topic: hashing-problem / Level: intermediate

• 1901. Implement a function to find the longest substring that is an anagram of another substring using hashing.
• 1902. Create a program to find the maximum product of two distinct elements in an array using hashing.
• 1903. Write a function to find the longest substring that contains the same character using hashing.
• 1904. Given a string, write a program to count the occurrences of a specific letter in a string using a hash map.
• 1905. Implement a function to check if two arrays have the same frequency of elements using hashing.
• 1906. Create a program to find the total number of unique characters in a string using a hash set.
• 1907. Write a function to determine if two strings can be rearranged to form a valid palindrome using hashing.
• 1908. Given an array, write a program to count the occurrences of each digit in a number using hashing.
• 1909. Implement a function to find the first unique character in a string using a hash map.
• 1910. Create a program to check if a string contains balanced parentheses using a hash map.
• 1911. Write a function to find the total number of vowels in a string using a hash map.
• 1912. Given two strings, write a program to check if they are equal when case is ignored using hashing.
• 1913. Implement a function to find the longest substring that contains exactly k distinct characters using hashing.
• 1914. Create a program to count the occurrences of each character in a string using a hash map.
• 1915. Write a function to find the maximum frequency of any character in a string using a hash map.
• 1916. Given a list of integers, write a program to determine if it contains duplicate elements using a hash set.
• 1917. Implement a function to find the first character that appears twice in a string using a hash map.
• 1918. Create a program to find the longest substring that contains the same character using hashing.
• 1919. Write a function to check if two arrays contain the same elements using hashing.
• 1920. Given a string, write a program to count the total number of unique characters in a string using hashing.
• 1921. Implement a function to find the longest substring that is a palindrome using hashing.
• 1922. Create a program to check if two strings can be rearranged to form a valid word using hashing.
• 1923. Write a function to find the maximum frequency of any character in a string using a hash map.
• 1924. Given a string, write a program to count the occurrences of each character using a hash map.
• 1925. Implement a function to check if two strings can be transformed into another string using hashing.
• 1926. Create a program to find the frequency of each digit in a number using hashing.
• 1927. Write a function to count the total number of vowels and consonants in a string using a hash map.
• 1928. Given a list of integers, write a program to count the total number of odd numbers using a hash set.
• 1929. Implement a function to find the longest substring with exactly one repeating character using hashing.
• 1930. Create a program to check if two strings are isomorphic using hashing.
• 1931. Write a function to find the longest consecutive sequence of characters in a string using hashing.
• 1932. Given two strings, write a program to check if they can be transformed into a palindrome using hashing.
• 1933. Implement a function to count the occurrences of each character in a string using a hash map.
• 1934. Create a program to find the total number of unique words in a paragraph using hashing.
• 1935. Write a function to find the first character that appears twice in a string using a hash map.
• 1936. Given a string, write a program to check if it is a valid identifier using hashing.
• 1937. Implement a function to find the maximum frequency of any digit in a number using a hash map.
• 1938. Create a program to check if two strings can be rearranged to form a valid palindrome using hashing.
• 1939. Write a function to find the total number of vowels in a string using a hash map.
• 1940. Given a string, write a program to count the total number of unique letters using hashing.
• 1941. Implement a function to check if two arrays have the same frequency of elements using hashing.
• 1942. Create a program to find the longest substring that is an anagram of another substring using hashing.
• 1943. Write a function to find the longest substring that contains the same character using hashing.
• 1944. Given an array of integers, write a program to determine if it contains duplicate elements using a hash set.
• 1945. Implement a function to find the first unique character in a string using a hash map.
• 1946. Create a program to count the occurrences of each letter in the English alphabet in a string using a hash map.
• 1947. Write a function to find the maximum frequency of any character in a list of strings using hashing.
• 1948. Given two strings, write a program to check if they are equal when case is ignored using hashing.
• 1949. Implement a function to count the total number of consonants in a string using a hash map.
• 1950. Create a program to check if two strings can be transformed into another string using hashing.

• More Levels

• Beginner
• Advanced