Unique Number of Occurrences - Given an array of integers arr, return true if the number of occurrences of each value in the array is unique or false otherwise. Example 1: Input: arr = …

Feb 20, 2023 · Step 1: Use a LinkedHashSet to store unique elements from the array as it maintains the insertion order. Step 2: Iterate over the set to copy the unique elements back to …

Jun 12, 2024 · Given an array arr [] of length N, The task is to count all distinct elements in arr []. Examples: Explanation: There are three distinct elements 10, 20, and 30. Naïve Approach:

Placing Valid Elements: If count = 2, the current element is within the allowed frequency, so we place it at nums[j] and increment j. This ensures that each element appears at most twice in …

33. Search in Rotated Sorted Array 34. Find First and Last Position of Element in Sorted Array 35. Search Insert Position 36. Valid Sudoku 37. Sudoku Solver 38. Count and Say 39. …

Feb 20, 2024 · To solve this problem, we can utilize a two-pointer approach. We'll maintain two pointers, l and r, where l represents the index for placing unique elements, and r iterates …

Given an integer array nums sorted in non-decreasing order, remove the duplicates in-place such that each unique element appears only once. The relative order of the elements should be …

Dec 6, 2024 · Given an integer array nums sorted in non-decreasing order, remove duplicates in-place so that each unique element appears only once. Return the count of unique elements (k) …

Feb 24, 2024 · First, iterate through the input list, arr, and maintain a dictionary, items_and_counts, where each key-value pair corresponds to an element and its count of …

Dec 4, 2024 · Given an integer array nums sorted in non-decreasing order, remove the duplicates in-place such that each unique element appears only once. The relative order of the elements …