Minimum number of distinct elements after removing m items in python Using remove() Method The remove() method removes a specific item from the set. answer is 3. Example 1: Input: arr = [5,5,4], k = 1 O Mar 27, 2024 · Introduction In this blog, we will discuss a problem in which we have to print the Minimum number of distinct elements after removing m items. Examples: Input: A [] = {1, 7, 7, 4, 4, 4}, N = 6 Output: 0 Explanation: 3 pairs containing distinct elements can be formed from the array. Sep 5, 2021 · In one operation, you can remove any element from the array, and the cost of this operation is the sum of all elements in the array present before this operation. Update the map for each change in any extra element to any other value. The simplest way to remove duplicates is by converting a list to a set. They allow you to store and manage a collection of elements. Oct 10, 2023 · One such function is the "distinct" function, primarily used to remove duplicate elements from a list or other iterable. Let's explore some more ways and see how we can randonly select elements from list without repetition in python. we need to select at most one element from each vector such that at the end we should have maximum number of unique elements. Example 2: Input: arr = [4,3,1,1,3,3,2], k = 3 Output: 2 Explanation: Remove 4, 2 and either one of the two 1s or three 3s. This blog post will explore the various ways to remove elements If the array has fewer than 3 elements, remove all remaining elements. Jan 10, 2025 · Welcome to Subscribe On Youtube 3397. Mar 13, 2023 · In this method, we use the Counter () function from the collections module to count the occurrences of each element in the tuple, and then convert the dictionary keys to a tuple to get the unique elements. Understanding how to effectively remove elements from a list is crucial for writing clean, efficient, and correct Python code. The simplest way to remove an element from a list by its value is by using the remove ()method. The keys and values could be anything. Mar 7, 2024 · By using pop(2), we removed the element at index 2 which was 3, and the method returned it. This blog post will explore various methods to achieve Jul 11, 2025 · If a number occurs more than once, choose any number y from the array and replace the x in the array to x+y such that x+y is not in the array. Jan 24, 2025 · In Python, lists are a fundamental and versatile data structure. fromkeys(lst) creates a dictionary with list elements as keys. As I understand it, a set has exactly one or zero of an element. Dec 18, 2017 · The characteristics of sets in Python are that the data items in a set are unordered and duplicates are not allowed. Nov 24, 2023 · we have vector or vectors which consits of numbers. append(distinct) else: continue print(“The list with unique elements only:”) print(new_list) 1 day ago · The following sections describe the standard types that are built into the interpreter. A key aspect of their mutability is the ability to remove items, enabling tasks like filtering data, cleaning datasets, or updating collections in real time. Return the minimum number of deletions it would take to remove both the minimum and maximum element from the array. Given an array of numbers nums and an integer K, find the maximum number of distinct elements after removing exactly K elements from the nums array. Dec 23, 2024 · In this how-to guide, you'll explore different ways to remove items from lists in Python. To retrieve an item from the top of the stack, use pop() without an explicit index. However, this approach does not preserve the original order. Apr 27, 2023 · We use Counter to count the frequency of each element in the input array. Example: Mar 25, 2023 · For each element check if the element is greater than the previous element or not. my_list = [1, 2, 4, 4, 1, 4, 2, 6, 2, 9] new_list = for i in my_list: if my_list. Aug 9, 2021 · I have an array of numbers, I want to delete k items such that they are next to each other such that the number of distinct elements in the array after deletion is maximum. Sep 5, 2012 · The code receives inputs up to a range set by the user, appends them into the elem_list, and uses dict_unique_word dictionary to get number of unique words received. Manipulating sets often involves the need to remove elements from them. May 1, 2024 · Maintain a set to store all the distinct elements of arr []. In this blog, we’ll explore how to use `Counter` to count element occurrences in a list and then filter the list to retain only elements that meet a specified minimum occurrence threshold. Similarly get the sum of costs to increment all duplicates till the Jul 15, 2025 · Explanation: random. This method is very efficient and the most straightforward way to get unique elements from a list. Often, during data manipulation and processing, you need to remove elements from a list. Whether you are cleaning up data, modifying a collection based on certain conditions, or optimizing memory usage, understanding how to effectively remove elements is crucial. Jun 10, 2023 · The del statement delete an element from a given list by its index number or a slice of elements by a range of indices. Example 1: In-depth solution and explanation for LeetCode 1481. Find the least number of unique integers after removing exactly k elements. The task is to find the minimum number of elements to be removed such that no three consecutive elements in the array are either increasing or decreasing. Intuitions, example walk through, and complexity analysis. Dec 6, 2024 · How to Create a New List by Removing an Element Without Mutating the Original List in Python When working with lists in Python, you might encounter situations where you want to remove a specific element from a list but without altering the original list. Oct 16, 2015 · Is there a standard way to represent a "set" that can contain duplicate elements. Whether you need to remove duplicates, delete elements by value or index, or filter lists based on conditions, these examples will help you efficiently manipulate lists in Python. In this article you will learn the different methods of creating a list, adding, modifying, and deleting elements in the list. Jul 11, 2025 · This ap roach defines a function count_distinct that takes an array as input and returns the count of distinct elements in the array using Python's built-in set data structure. The set data structure is used to remove duplicates from the array and get only the distinct elements, and len function is used to get the count of those distinct elements. If k is more than the number of distinct elements, print -1. Given an integer array nums of size n, return the minimum number of moves required to make all array elements equal. If yes then check for the next element. Better than official and forum solutions. Mar 6, 2025 · Using Hash Map and Max Heap - O (n * log n) time and O (n) space The idea is to maximize the number of distinct elements after removing k elements by first reducing the frequency of duplicate prioritizing elements with the highest frequency (using a max heap), and then adjusting for any remaining removals. Using a Set Using a set to count the number of unique values in a Python list leverages the property of sets where each element is stored only once. Given an array of items, the i'th index element denotes the item id’s and given a number m, the task is to remove m elements such that there should be minimum distinct id’s left. The driving idea here would be to use your reductions to take out the elements that appear the fewest number of times first. Since we have to minimize the number of distinct elements after removing k elements so, we’ll start from those elements which have a minimum frequency in the given array. sample (a, 3) selects 3 unique elements from a. We are given a specific operation—removing the first three elements—which we can leverage to solve the get minumum of distinct elements after removing m items in go programming language algorithm: count number of element and store them in map with key as element value and value as number of element. Download ZIP Minimum number of distinct elements after removing m items Raw minimum_unique. Often, during data manipulation tasks, you need to remove specific items from a list. Therefore, the problem reduces to finding the minimum element in a window of size k+1 for each position. Examples : Input : arr[] = {5, 2, 3, 6, 1} Output : 1 Given arr[] is not in required form (2 < 3 < 6). Let's see some more methods to remove duplicates and keep the order in Python List. We have a list of elements (integers), and we should return a list consisting of only the non-unique elements in this list. This blog post will Jan 24, 2025 · In Python, sets are unordered collections of unique elements. If an element from b doesn't from random import sample number_of_items = 4 sample(all_data, number_of_items) If all_data could contains duplicate entries than modify your code to remove duplicates first and then use shuffle or sample: Feb 20, 2024 · Problem Formulation: Python programmers commonly encounter the need to remove duplicates from a list, ensuring that each element is unique. Jul 23, 2025 · Output: 2 Explanation: The subsequence of length 5 containing minimum number of distinct elements is {3, 3, 3, 4, 4}, consisting of 2 distinct elements, i. An array is considered non-decreasing if each element is greater than or equal to its previous element (if it exists). Understand when to use each method for efficient list management and flexible data handling. You can get the unique values by converting the list to a set. Print the number of distinct id’s. Here's how we can achieve this: Key Observations If the array is already distinct, no operations are needed. This statement is flexible and versatile and can be used to remove multiple elements at once by slicing. Jan 9, 2025 · Remove 3 elements from the beginning of the array. Jul 12, 2025 · Let ans be the length of the minimum subarray that on removing from the given array, makes the elements of the array unique. py Jun 14, 2020 · The challenge is as follows: Given an array of integers arr and an integer k. e. They allow you to store and manage collections of elements. Dictionaries in Python allow us to store and Sep 10, 2024 · Learn how to work with Python lists with lots of examples. For example, if element A is in the position of element B, and element B is in the Relative Sort Array - Given two arrays arr1 and arr2, the elements of arr2 are distinct, and all elements in arr2 are also in arr1. Run a for loop from 0 to N-1. Nov 5, 2021 · Learn how to remove an item from a Python list, using the pop, remove, and del methods. Using set () We can directly use a set () to store unique The indexing in python starts from 0. Using practical examples, like managing a library book list and a contact book application, you'll learn efficient techniques for handling list item removal. The principal built-in types are numerics, sequences, mappings, classes, instances and exceptions. Nested Lists and List Comprehension are also discussed in detail with examples. Jul 23, 2025 · Here, we need to split elements of a list and count the unique values from the resulting segments. Mar 3, 2025 · The given array may contain duplicates and the output should print the k-th element among all unique elements. Master list management for your Python projects. I want functionality to have any number. Familiarize yourself with methods like remove (), pop (), and del for list management. A frequent operation when working with lists is the removal of elements. If you try to add a data item to a set that already contains the data item, Python simply ignores it. Return the maximum subarray sum of all the subarrays that meet Given an array of numbers nums and an integer K, find the maximum number of distinct elements after removing exactly K elements from the nums array. Replace A [i] with j in the remaining array elements Given an array of distinct integers arr, find all pairs of elements with the minimum absolute difference of any two elements. Sort the elements of arr1 such that the relative ordering of items in arr1 are the same as in arr2. Python Remove Tuple Items using remove (),list () and tuple () Method The code removes the element N from tuples in the list test_list. The test cases are generated so that the answer fits in a 32-bit integer. Understanding how to effectively remove list items is crucial for cleaning data, modifying sequences, and optimizing code performance. This method is efficient because it handles selection in a single operation. h> using namespace std Given an array of integers arr and an integer k. length and increment nums [i] by 1. Return the maximum possible number of distinct elements in nums after performing the Apr 9, 2021 · Python list is an ordered sequence of items. I am Jul 11, 2025 · The task of removing the first element from a list in Python involves modifying the original list by either deleting, popping, or slicing the first element. The program should output distinct elements of the array. If a list is converted to a set, all duplicate elements are automatically removed. remove () only removes the first occurrence of the specified element from the list. Jul 23, 2025 · Given an array of n distinct positive integers. Jul 23, 2025 · Explanation: dict. Step by step approach: Use a hash map to count the frequency of each element in the Jul 15, 2025 · Lists in Python have various built-in methods to remove items such as remove, pop, del and clear methods. 1 and 3 will be left. Oct 23, 2012 · I'm iterating over a list of tuples in Python, and am attempting to remove them if they meet certain criteria. please give code Mastering the Art of Removing Items from Python Lists: A Comprehensive Guide Python lists are dynamic, mutable sequences that allow developers to store and manipulate ordered collections of data. When it comes to lists, it can be used to remove a slice of elements or a single element by specifying its index. Feb 15, 2024 · Least Number of Unique Integers after K Removal - Leetcode 1481 - Python NeetCodeIO 275K subscribers Subscribed Can you solve this real interview question? Maximum Sum of Distinct Subarrays With Length K - You are given an integer array nums and an integer k. {3, 4}. Elements that do not appear in arr2 should be placed at the end of arr1 in ascending order. Jan 14, 2024 · Writing this code out anyway, we will use the itertools in Python to provide all combinations of the items, and then will check how many unique items exist in that new list. Find the solution of Minimum Number of Operations to Make Elements in Array Distinct Leetcode question with step by step explanation in 2 approaches and 3 solutions in languages like Java, Python, CPP. Cost of this operation is (2 + 1) = 3. Duplicate elements must be removed to make the array distinct. Example 1: Apr 23, 2025 · In Python programming, lists are a fundamental and versatile data structure. Idea: The main idea to solve this problem efficiently is to use (Greedy Approach). Then iterate from L to R and check how many elements inside this range can be used to replace the extra elements present in the array. example; v1= {1, 2 ,3 } v2= {1, 3} v3= {1} choose 2 from v1, 3 from v2 and 1 from v3. Minimum String Length After Removing Substrings in Python, Java, C++ and more. The task is to find the minimum number of operations to make the array a distinct one. Constraints: May 14, 2025 · 7 Easy Ways to Remove an Item from a List in Python [+Examples] Removing items from Python lists requires choosing the right method for your specific scenario. Remove Element in Python, Java, C++ and more. This blog post will explore various ways to remove items from a list in Python, covering the basic concepts, different usage methods, common practices, and best practices. Some colle Can you solve this real interview question? Minimum Increment to Make Array Unique - You are given an integer array nums. Your task is to remove both the minimum and maximum values from this array. We can easily observe that if all array elements become distinct after removing a subarray of length ans, then this condition is also true for all values greater than ans. Jul 23, 2025 · Total distinct elements will be equal to the size of the map. After pushing all the elements into the set, print the size of the set as the final answer. org Minimum number of distinct elements after removing m items - GeeksforGeeks Problem Description You have an array nums containing distinct integers at different positions (0-indexed). Discover effective techniques to remove elements from Python lists, including using built-in methods and advanced list manipulation. Below is the implementation of the approach: C++ Java Python C# JavaScript #include <bits/stdc++. An array can have duplicate elements, in this article, we will discuss a few ways to remove duplicate elements from an array. Store all the unique elements frequencies of the given array in the frequency table. Removing from the end of a list using is the most common and efficient approach. Continue reading for Jul 23, 2025 · Removing items from an array can be a common task, and there are several ways to accomplish this depending on the specific needs of your application. The number of extra elements will be equal to the (size of array - size of map). We'll cover append, remove, sort, replace, reverse, convert, slices, and more In Python, you can remove items from a set using several methods. If the number of distinct elements is equal to the length of the array, we return 1, as all elements are distinct and can be put in a single subset. Find the maximum subarray sum of all the subarrays of nums that meet the following conditions: * The length of the subarray is k, and * All the elements of the subarray are distinct. While remove () targets values and pop () works with indices, list comprehensions offer the most Pythonic solution for filtering multiple elements. This article will cover different methods to remove items from an array in Python. Duplicate Elements Removal: The user inputs integer elements of an array randomly i. For example: May 1, 2025 · a = [1, 2, 3, 4, 5, 6, 7, 8] b = [2, 4, 6] for item in b: if item in a: a. Take note that I just start to learn python and would like only the simplest solutions. So, remaining ids are 1, 3 and 5 i. Suitable for beginners. why the following code cannot show the result: [ 6, 9], instead it shows [ 2, 9]. However, it does not maintain the order of Jun 18, 2024 · In this example, we first convert the list to a set, which automatically removes any duplicate elements. Mar 17, 2025 · We will provide an array or vector for the minimum number of subsets with distinct elements in the question. 1. Feb 13, 2025 · 1 <= n <= 10^5 1 <= nums[i] <= 10^9 1 <= cost[i] <= 10^4 My approach to solve this was to pick initial unique items and store in a HashSet in Java Next get the duplicate items in nums in sorted order, and calculate the least cost for each element, then increment item till it becomes unique and calculate cost for that element. Whether you want to remove a specific value, an element at a particular index, or clear the entire list, Python provides multiple ways to achieve In Python, what is the fastest algorithm for removing duplicates from a list so that all elements are unique *while preserving order*? [duplicate] Sep 7, 2025 · List items can be removed based on their value or position in the list. Maximum Number of Distinct Elements After Operations Description You are given an integer array nums and an integer k. In-depth solution and explanation for LeetCode 2696. Also learn how to clear an entire list. You are allowed to perform the following operation on each element of the array at most once: Add an integer in the range [-k, k] to the element. However, it requires knowing or finding the index or range of indices of the elements (which you want to discard). Iterate through all the elements in arr [] and insert them into the set. Using set () We can directly use a set () to store unique Moved PermanentlyThe document has moved here. For example, there are n = 6 items, ids = [1, 1, 1, 2, 3, 2], and the maximum number of items that can be deleted is m = 2. Solution Approach The goal is to determine the minimum number of operations needed to make the array distinct. Oct 2, 2018 · Recommended Poss: Count subarrays with equal number of 1’s and 0’s Smalles subarray with all occurrences of a mos frequent element Merge two binary Max Heaps Minimum number of disinct elements after removing m items Find minimum cos to buy all books Element which occurs consecutively in a given subarray more than or equal to K times Sum of Sep 25, 2020 · 1 Need guidance on how to start writing a code to find minimum number of distinct elements after removing m items using R scripting. md File metadata and controls Preview Code Blame 171 lines (125 loc) · 4. py May 16, 2022 · Given an array A [] of length N, the task is to find the minimum size of the array after selecting and removing distinct element pairs any number of times. Understanding how to effectively remove elements from a set in Python is crucial for various data processing and algorithm implementation tasks. Step by step approach: Use a hash map to count the frequency of each element in the If the array has fewer than 3 elements, remove all remaining elements. Method 3: Using Del Statement The del statement in Python is used to delete objects. In-depth solution and explanation for LeetCode 27. remove(item) print(a) Output [1, 3, 5, 7, 8] Explanation: The code loops through each element in list b and removes the corresponding elements from list a. Jul 12, 2025 · Auxiliary Space: O (n * m), where n is the number of tuples in the list and m is the number of elements in each tuple. The code iterates through a copy of the list using list slicing, removing elements that satisfy the condition (even numbers). Whether you’re a novice learning Python 1 day ago · 5. Mar 15, 2024 · Python sets are a versatile and powerful data structure used for storing unique elements. So If there are more than one item with the specified value, the remove() method removes the first occurrence: Nov 11, 2022 · The minimum number of elements can be found by taking the minimum of n- (j-i-1) overall j. reverse map key with number of element and value as element value, so the key will be sort automatically based on number of element start removing element from the map return the len of the map Oct 15, 2012 · 1537 First declare your list properly, separated by commas. count(i) == 1: distinct = my_list[i] new_list. I don't know where to start. A HashMap is a data structure that can map certain keys to specific values. May 1, 2025 · Getting unique values from a list is a common task in python unique list values in list programming. For example, given a list like ["a,b,c", "b,c,d" , e,f"], we want to extract each value, count only the unique ones, and return the result. The function ensures no duplicates and maintains the order of selection. Oct 3, 2025 · Given an integer array arr [], find all the distinct elements of the given array. Often, during data manipulation tasks, you'll need to remove items from a list. Jul 19, 2019 · Finding the minimum number of unique elements is equivalent to finding the maximum number of duplicates. If an element is not in its correct position, it indicates that it is a part of a cycle with one or more other elements that also need to be moved. I had to remove max element and store the list in a variable and same with min element. They allow you to store an ordered collection of items that can be of different data types. Oct 18, 2025 · For these next k+1 elements, the best element to place at index i in the sorted array is the minimum element. Naive Approach: The simplest approach is to generate all subsequences of length K and for each subsequence, find the number of distinct elements present in them. A = [2, 1] Given array A = [2, 1] Remove 2 from the array => [1]. The task is to take an input list, like [1, 2, 2, 3, 3, 3, 4], and produce an output list with duplicates removed, such as [1, 2, 3, 4]. Calculate the smallest adjustment cost of changing A [0] to j for the first element of the array, dp [0] [j], using the formula dp [0] [j] = abs (j - A [0]). Using set () We can use set () to remove duplicates from the list. Jul 15, 2025 · Given an array of items, an ith index element denotes the item id’s, and given a number m, the task is to remove m elements such that there should be minimum distinct id’s left. Oct 28, 2024 · Learn effective methods to remove items from a list in Python using examples and code. Mar 28, 2025 · In Python, lists are a versatile and commonly used data structure. The result is a list with the same elements as the original, but with all duplicates removed. , without counting. Apr 26, 2024 · Iterative Removal: The code iterates through the frequencies from minf to maxf (the minimum and maximum frequencies) and calculates how many unique integers need to be removed to achieve the desired grouping. This way, we can also keep track of the removed item. After all the elements have been traversed, we will get a sorted array. This blog post will explore the different methods to remove elements from a set in Python, their usage, common Learn how to delete items from Python lists using remove(), pop(), and del. Then, we convert the set back to a list. Without changing order of the list I think the best way is to delete or remove all unique element. Aug 1, 2024 · Understand how to remove items from a list in Python. Mar 10, 2024 · Method 1: Using Set Data Structure The set data structure in Python is designed to store unique items by definition. Understanding Apr 17, 2025 · In Python, you can remove items (elements) from a list using methods such as remove (), pop (), and clear (). Often, during data manipulation tasks, you need to remove elements from a list. Understanding the different ways to remove items from a Python list is crucial for writing efficient and clean code. Then, we calculate the number of distinct elements in the array. Understanding the different methods to remove elements from a list is crucial for writing efficient and correct Python code. Return a list of pairs in ascending order (with respect to pairs), each pair [a, b] follows Aug 9, 2021 · I have an array of numbers, I want to delete k items such that they are next to each other such that the number of distinct elements in the array after deletion is maximum. Remove specific array item The remove () method removes the first occurrence of a specified value from the array. Jan 29, 2025 · In Python, lists are a fundamental and versatile data structure. Find the minimum cost to remove all elements from the array. To add an item to the top of the stack, use append(). In this tutorial, you will learn how to remove duplicate elements from an array of list in Python. They are particularly useful in scenarios where you need to eliminate duplicate values, perform mathematical set operations, or require fast membership testing. Entry; public class DistinctIds { // Function to find distintc id's static int distinctIds (int arr [], int n, int mi) { Map <Integer, Integer> m = new HashMap <Integer, Integer>(); int count = 0; int size = 0; // Store the occurrence of Sep 10, 2020 · Simpler approach is based on fact, that we first can remove any items with occurency count > 1 without changing of distinct values count, then remove some of the rest ones - now distinct values count becomes less. They allow you to store a collection of elements, which can be of different data types. By using remove function if I stored it in variable it gives none as output. You can also use the del statement to delete items by index or slice. This tutorial aims to provide an in-depth exploration of the distinct problem in Python and its practical solutions. Just like each line of code has its unique purpose, so do the elements in a list, and discerning the singular gems from the clutter of duplicates becomes a crucial skill. Return the minimum number of operations needed to make the elements in the array distinct. Example 1: Input: nums = [1,2,2 Oct 14, 2023 · Algorithm: Create a 2D array with the initializations dp [n] [M+1] to record the least adjustment cost of changing A [i] to j, where n is the array's length and M is its maximum value. Also, learn how to iterate the list and access the elements in the list in detail. Return the minimum number of moves to make every value in nums unique. Here is my code: minimum-number-of-distinct-elements-after-removing-m-items. You can only remove elements in two ways: Delete from the front of the array (removing the first element) Delete from the back of the array (removing the last element) You need to find the minimum number of Sep 9, 2025 · Given an integer array, trim it such that its maximum element becomes less than twice the minimum, return the minimum number of removals required for the conversion. That is, after removal either a i - 1 > a i < a i + 1 or a i - 1 < a i > a i + 1. Example 1: Input: nums = [5,2,3,1] Output: 2 Explanation: The pair (3,1) has the minimum sum of 4. This blog post will explore various methods to remove Jul 15, 2025 · Counting the number of unique values in a Python list involves determining how many distinct elements are present disregarding duplicates. After replacement, nums = [5,2,4]. Since sets are unordered, there is no index-based removal, but you can remove specific elements by their value. Find the Minimum No of Distinct Elements after Removing M IDS Newton CSE 513 subscribers Subscribed Jul 23, 2025 · Total distinct elements will be equal to the size of the map. Each data value has a unique index value in a hash table, which //Java program for Minimum number of //distinct elements after removing m items import java. In the above block the integers 6, 4, 1, 5, 9 are the array elements and 0, 1, 2, 3, 4 are the respective index values. Map; import java. Else remove that element. We will be using the Hashmap data structure for solving the question. We need to find out the minimum number of subset Jul 24, 2025 · This article presents a collection of Python programs demonstrating different ways to remove elements from a list. Remove one element from the starting of the array arr [] and append any integer to the end. Since we can change up to 3 elements, we effectively consider scenarios where we "remove" 0-3 elements from the left and 3-0 elements from the right, finding the minimum difference among all these combinations. util. Least Number of Unique Integers after K Removals - Given an array of integers arr and an integer k. The given array may contain duplicates and the output should contain every element only once. Using Lists as Stacks ¶ The list methods make it very easy to use a list as a stack, where the last element added is the first element retrieved (“last-in, first-out”). Let’s examine different methods to achieve this, starting from the most efficient approach. The image below shows the flow chart for checking of duplicate elements in an array or list. Jul 23, 2025 · Using Cycle Detection - O (nlogn) Time and O (n) Space This approach uses cycle detection method to find out the minimum number of swaps required to sort the array. Feb 12, 2024 · Overview Welcome to our guide on how to remove items from a dictionary in Python, an essential skill for both beginners and seasoned developers working with this versatile data structure. 🏋️ Python / Modern C++ Solutions of All 3749 LeetCode Problems (Weekly Update) - kamyu104/LeetCode-Solutions Apr 6, 2025 · Return the minimum number of operations needed to make the array non-decreasing. Example 1: The solution works by sorting the array and considering different combinations of removing elements from the beginning and end. 3 geeksforgeeks. Note that an empty array is considered to have distinct elements. Once the occurrences become consecutive, then traverse the sorted array and count distinct elements by comparing the consecutive elements. 4 days ago · Manually counting occurrences and filtering can be tedious, but Python’s `collections. This blog post will explore the different ways to remove elements in Python Jul 15, 2025 · Removing Occurrences of item from a list Using remove () In this method, we iterate through each item in the list, and when we find a match for the item to be removed, we will call remove () function on the list. Follow the steps below to Implement the idea: Initialize a res variable with 0 and sort arr []. Jul 23, 2025 · Given an array arr [] of N integers. Example 1 - Aug 6, 2017 · Remove 2 and 4 completely. . If the array has fewer than 3 elements, remove all remaining elements. Counter` simplifies this process dramatically. This is a basic way to create a unique list in Python, but there’s much more to learn about handling lists and removing duplicates. Hence, we need to sort the unique elements and their Jul 11, 2025 · In this article, we'll learn several ways to remove duplicates from a list in Python. Each method provides a different approach to achieving this. Jun 7, 2023 · I am looking for help. In one move, you can pick an index i where 0 <= i < nums. Removing elements from a list can be done in various ways depending on whether we want to remove based on the value of the element or index. In one move, you can increment n - 1 elements of the array by 1. Least Number of Unique Integers after K Removals in Python, Java, C++ and more. Here are the common ways to remove items from a set: 1. Example 1: Input: nums = [2,10,7,5,4,1,8,6] Output: 5 Explanation: The minimum element in the array is nums [5], which is 1. The value of index i can be found through its previous dp array element value. 71 KB Raw Jul 11, 2025 · Sort the array so that all occurrences of every element become consecutive. At times, you may need to remove specific items from a list to modify its contents. Thus, no element left in the array. Nov 14, 2025 · In Python, lists are one of the most versatile and commonly used data structures. Algorithm: Step 1: Initialize an empty array brr [] of size n and a variable i to 1 to keep track of the index of the sorted Jul 23, 2025 · Remove Elements From A List Based On A Condition Using Remove () Method In this example, the Python code , a list named original_list is created with integers from 1 to 9, and a lambda function named condition is defined to identify even numbers. This method is efficient when you know the exact Jan 29, 2025 · In Python programming, the ability to remove elements from various data structures such as lists, sets, and dictionaries is a fundamental skill. Example 1: Input: arr = [5,5,4], k = 1 Output: 1 Explanation: Remove the single 4, only 5 is left. Map. the task is to find the minimum number of operations required to make all the elements of the array distinct using the following operations. HashMap; import java.