Unique Occurrences Algorithms for Numbers
Given a list of integers nums, return whether the number of occurrences of every value in the array is unique. Note: Numbers can be negative. Constraint n ≤ 100,000 …
Tag: C++ hash table
Using Hash Map to Find Equivalent Value and Frequency in Array
Given a list of integers nums, return whether there’s an integer whose frequency in the list is same as its value. Constraints n ≤ 100,000 where n is the …
How to Check if a Given String has Unique Characters?
Given a string s, determine whether it has all unique characters. Example 1 Input s = “abcde” Output true Explanation All characters only occur once Example 2 Input s …