Topic: hashing-problem / Level: intermediate

• 1001. Given an array of integers, find the longest consecutive sequence using a hash set.
• 1002. Implement a program that checks for a subarray with a sum equal to zero using a hash map.
• 1003. Write a function to find the first duplicate number in an array using hashing.
• 1004. Create a program to check if a string is a permutation of another string using a hash map.
• 1005. Given a list of words, find all pairs of words that are anagrams using hashing.
• 1006. Write a program that finds the maximum frequency of any element in an array using a hash map.
• 1007. Implement a function to find all unique triplets in an array that sum to a target value using hashing.
• 1008. Create a program that checks if two arrays contain the same elements (ignoring order) using hashing.
• 1009. Write a function to determine the number of valid Sudoku rows, columns, and boxes using a hash table.
• 1010. Given two strings, write a function to find the longest common subsequence using a hash map.
• 1011. Implement a program to count the number of pairs of integers whose sum is equal to a specific target using hashing.
• 1012. Create a function to find the longest substring without repeating characters using a hash set.
• 1013. Write a program to find the number of occurrences of each character in a string using a hash map.
• 1014. Given a list of integers, find the count of elements that are greater than or equal to a specific number using hashing.
• 1015. Write a function to determine if a string is a valid anagram using hashing.
• 1016. Implement a program to count the frequency of elements in an array of strings using a hash map.
• 1017. Create a function to find the minimum window substring that contains all characters of another string using hashing.
• 1018. Write a program to find the intersection of two arrays using a hash map.
• 1019. Given a string, implement a function to find the longest palindromic substring using hashing.
• 1020. Write a function to check if two strings are isomorphic using hashing.
• 1021. Create a program to find all elements that appear more than once in an array using a hash map.
• 1022. Implement a function to find the maximum product of three numbers in an array using hashing.
• 1023. Write a program to return the indices of the first two numbers in an array that add up to a target using a hash map.
• 1024. Create a function that finds the longest consecutive characters in a string using hashing.
• 1025. Given a list of integers, write a function to count the number of unique elements using a hash set.
• 1026. Write a program to group anagrams from a list of strings using a hash table.
• 1027. Create a function to find the number of ways to form a word from a list of letters using a hash map.
• 1028. Implement a program to check if two strings are rotations of each other using hashing.
• 1029. Write a function to find the maximum length of a subarray with distinct integers using a hash set.
• 1030. Given a string, write a program to count the frequency of each word using a hash map.
• 1031. Create a function to find the longest substring with at most two distinct characters using hashing.
• 1032. Write a program to find the count of unique characters in a string using a hash set.
• 1033. Implement a function to find the total number of unique elements in a list of words using a hash set.
• 1034. Create a program to check if two strings are anagrams of each other using a hash map.
• 1035. Given an array of integers, write a function to determine if any two numbers add up to a specific target using hashing.
• 1036. Write a function to count the occurrences of a specific character in a string using a hash map.
• 1037. Create a program to find the longest substring with exactly k distinct characters using hashing.
• 1038. Implement a function to check if a list of strings contains any duplicates using hashing.
• 1039. Write a program to find the number of palindromic substrings in a given string using hashing.
• 1040. Given a string, write a function to find the longest substring that is a permutation of another substring using hashing.
• 1041. Create a function to determine if a list contains two numbers whose product is equal to a specific target using hashing.
• 1042. Write a program to find the first non-repeating character in a string using a hash map.
• 1043. Implement a function to check if a string is a valid bracket sequence using a hash map.
• 1044. Create a program to count the total number of unique letters in a paragraph using hashing.
• 1045. Write a function to find the first unique integer in an array using a hash map.
• 1046. Given two strings, implement a function to determine if they are anagrams using a hash table.
• 1047. Create a program that checks if a string can be rearranged to form another string using hashing.
• 1048. Write a function to find the longest substring that contains at least k distinct characters using hashing.
• 1049. Implement a program to find the count of pairs in an array whose difference equals a given number using hashing.
• 1050. Create a function to check if a string is a valid phone number format using hashing.

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