Topic: hashing-problem / Level: advanced

• 2001. Implement a function to find the maximum number of elements in a subarray that can be formed with unique characters using hashing.
• 2002. Given an array of integers, find the smallest subarray that contains all distinct elements using hashing.
• 2003. Write a function to find the maximum length of a subarray that has a sum equal to k using hashing.
• 2004. Create a program to check if an array can be partitioned into two subsets such that the sum of each subset is equal using hashing.
• 2005. Implement a function that counts the number of subarrays with equal frequency of all elements using hashing.
• 2006. Given two strings, find the longest substring of the first string that can be formed by the characters of the second string using hashing.
• 2007. Write a program to find all pairs of indices whose elements in the array sum up to a specific target using hashing.
• 2008. Create a function that checks if it is possible to rearrange a string to form a palindrome using a hash map.
• 2009. Implement a program to group anagrams from a list of strings with a time complexity of O(nk) using hashing.
• 2010. Write a function to find the maximum sum of non-adjacent elements in an array using a hash map to store sums.
• 2011. Create a program to determine the number of distinct substrings in a given string using hashing techniques.
• 2012. Given an array of integers, find the longest subarray with at most k distinct integers using a hash map.
• 2013. Write a function to count all possible combinations of pairs in an array that sum to a given value using hashing.
• 2014. Implement a program to find the longest substring in a string that is a permutation of another string using hashing.
• 2015. Create a function to find the number of unique triplets in an array that add up to zero using hashing.
• 2016. Write a program to find the maximum length of a contiguous subarray with a sum of 0 using a hash map.
• 2017. Given two arrays, determine if there is a one-to-one mapping between their elements using hashing.
• 2018. Implement a function to find the longest subsequence in an array that can be formed by deleting some elements using hashing.
• 2019. Create a program to check if two strings can be made equal by swapping only two characters using hashing.
• 2020. Write a function to find the frequency of each element in an array using hashing and return the maximum frequency.
• 2021. Given a string, find all the substrings that can be formed using a set of characters with hashing.
• 2022. Create a function that determines the longest sequence of consecutive integers in an unsorted array using hashing.
• 2023. Write a program to find the longest palindrome that can be formed from a string using a hash map.
• 2024. Implement a function to check if a sequence of numbers can form an arithmetic progression using hashing.
• 2025. Create a program to find the shortest substring that contains all characters of another string using hashing.
• 2026. Given an array of integers, find the number of subarrays whose sum is a perfect square using hashing.
• 2027. Write a function to determine the number of valid parentheses combinations that can be formed using a hash map.
• 2028. Implement a program to find the largest range of consecutive numbers in an unsorted array using hashing.
• 2029. Create a function to find the maximum size of a set of distinct elements in a sliding window using hashing.
• 2030. Given a string, write a program to determine the number of unique words using a hash map to track frequencies.
• 2031. Implement a function to find the count of unique numbers that can be formed using digits of a number using hashing.
• 2032. Create a program to determine if a string can be segmented into valid words from a dictionary using hashing.
• 2033. Write a function to check if a set of intervals overlap using a hash map to store start and end times.
• 2034. Given two arrays, implement a function to find the intersection of both arrays using hashing.
• 2035. Create a program to find the longest substring in a string where all characters are unique using hashing.
• 2036. Write a function to find the number of distinct values in a window of size k in an array using hashing.
• 2037. Implement a program to determine if it is possible to rearrange a string to avoid consecutive repeating characters using hashing.
• 2038. Create a function that checks if a string contains all characters of another string using a hash map.
• 2039. Given an array, write a program to find the first missing positive integer using hashing.
• 2040. Write a function to find all pairs of numbers in an array whose product equals a specific target using hashing.
• 2041. Create a program to check if a string is a valid anagram of a palindrome using a hash map.
• 2042. Given a string, implement a function to count the total number of palindromic substrings using hashing.
• 2043. Write a function to find the maximum length of a substring without repeating characters using hashing.
• 2044. Create a program to find the total number of distinct elements in a 2D matrix using hashing.
• 2045. Given an array of integers, write a function to find the maximum number of pairs with equal sum using hashing.
• 2046. Implement a function to determine the minimum number of deletions required to make two strings anagrams using hashing.
• 2047. Create a program to find the longest sequence of increasing characters in a string using hashing.
• 2048. Write a function to find the smallest window in a string that contains all characters of another string using hashing.
• 2049. Given an array of integers, implement a function to count the number of triplets that form a geometric progression using hashing.
• 2050. Create a program to find the count of all possible anagrams of a given string using a hash map.

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