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We are given an integer array flowers, where each element represents the beauty value of a flower in a line. We may remove any flowers we want, while preserving the relative order of the remaining flowers. After removals, the remaining sequence must form a valid garden.

The problem asks us to generate every unique palindrome that can be formed by rearranging the characters of a given string. A palindrome is a string that reads the same forward and backward. For example, "abba" and "racecar" are palindromes.

The problem gives us an array nums containing non-negative integers. We need to determine whether there exists an intege

The problem asks us to determine how many longest strictly increasing subsequences exist in a given integer array. A subsequence is formed by deleting zero or more elements without changing the relative order of the remaining elements.

The problem gives us an integer array nums and a list of update operations called queries. Each query contains two values: - vali, the amount to add - indexi, the position in the array to update For every query, we must first update the array element: After applying the update…

We are given two dates in the format DD.MM.YY: one representing the day of the Codeforces World Finals and the other representing Bob's date of birth. Bob can rearrange the components of his birth date-the day, month, and year-but only as complete numbers, not individual digits.

The problem asks us to repeatedly transform a number by summing its digits until only a single digit remains. The final single digit should then be returned. For example, if the input is 38, we first compute 3 + 8 = 11.

The problem gives us an integer array arr and two integers, m and k. We need to determine whether there exists a contiguous subarray of length m that repeats consecutively at least k times.

In this problem, Alice repeatedly draws random numbers until her score reaches at least k. Every draw independently produces an integer between 1 and maxPts, inclusive, and each value is equally likely.

The problem gives us a sorted array nums and an integer maximumBit. For every query, we must choose a number k such that: - 0 <= k < 2^maximumBit - The value of: is as large as possible.

This problem asks us to determine the minimum number of cameras required to monitor all nodes in a binary tree. Each camera placed on a node can monitor its parent, itself, and its immediate children.

The problem asks us to transform a binary string into a monotone increasing string using the minimum number of character flips. A binary string is considered monotone increasing if all 0s appear before all 1s. In other words, once a 1 appears, no 0 can appear after it.

The problem asks us to determine whether a given collection of cards can be rearranged into groups of consecutive numbers, each of size groupSize.

The problem is asking us to determine if a set of equations between single-letter variables can all be satisfied simultaneously. Each equation is either of the form "xi==yi" or "xi!=yi", where xi and yi are lowercase letters from 'a' to 'z'.

The problem is asking us to partition an integer array nums into exactly k subsets of equal size, such that no subset co

This problem asks us to determine how many non-negative integers x exist such that the factorial of x ends with exactly k trailing zeroes. The function f(x) counts trailing zeroes in x!. For example, f(3) = 0 because 3! = 6 has no trailing zeroes, and f(11) = 2 because 11!

We are asked to determine if a string of round brackets is balanced. A balanced sequence is one where every opening bracket «(» has a corresponding closing bracket «)», and brackets are properly nested.

The problem gives us an integer array nums and an integer k. For every element in the array, we must choose exactly one of two operations: - add k - subtract k After modifying every element, we calculate the score of the array, which is defined as: Our goal is to minimize this…

In this problem, we are given a binary matrix where each cell contains either 0 or 1. A value of 1 represents land, while 0 represents water. An island is formed by connecting adjacent land cells in the four cardinal directions: up, down, left, and right.

The problem asks us to find the longest substring that is both a prefix and a suffix of the given string s, while also e

The problem requires simulating the transformation of an array over consecutive days according to a simple local rule. Each day, every element of the array (except the first and last) is compared with its immediate neighbors.

In this problem, we are given a binary array called bits. The array represents a sequence of encoded characters using the following rules: - A one-bit character is represented by a single 0 - A two-bit character is represented by either 10 or 11 The array is guaranteed to end…

This problem gives us the root of a Binary Search Tree, abbreviated as BST, along with an integer k. We need to return the kth smallest value in the tree. A Binary Search Tree has a very important property: - Every value in the left subtree is smaller than the current node.

The input describes an undirected tree with n cities. Since the graph is a tree, there are exactly n - 1 edges and there is a unique simple path between every pair of cities. The problem asks us to examine every possible connected subset of cities.

The problem asks us to design a mutable data structure that simulates the classic Snake game. The game is played on a rectangular grid with dimensions height x width. The snake starts at the top-left corner (0, 0) and initially has length 1.

We are given a filesystem path as a string. In this operating system, multiple consecutive '/' characters are treated exactly the same as a single '/'. That means paths like ///home//user///docs and /home/user/docs refer to the same location.

The problem asks us to construct a lowercase string of length n such that the sum of the numeric values of its character

The problem asks us to find the closest leaf node to a given target node k in a binary tree. The input is the root of a binary tree where each node has a unique integer value. A leaf node is defined as any node without children.

The problem asks us to count how many contiguous subarrays contain exactly k odd numbers. We are given an integer array

LeetCode 669, Trim a Binary Search Tree, asks us to modify a binary search tree so that every remaining node has a value within the inclusive range [low, high].

The problem describes a corrupted set of integers. Originally, the set contained every number from 1 through n exactly once. Because of an error, one number was duplicated, which means one other number disappeared.

This problem asks us to simulate a sequence of brick removals in a 2D grid, while determining how many additional bricks become unstable and fall after each removal.

We are given a set of points in two-dimensional space, where each point can be thought of as a vector from the origin. Each vector has two coordinates, x and y, and we are allowed to independently flip the sign of each coordinate.

This problem gives us an array of lowercase English words and asks us to find the longest word that can be constructed one character at a time using other words from the same dictionary. More specifically, suppose we have a candidate word like "world".

The problem gives us a database table named Views. Each row represents a single viewing event where a user viewed an article on a specific date.

The problem asks whether a given undirected graph is bipartite. In simpler terms, we are given a graph represented as an adjacency list graph, where graph[u] lists all nodes directly connected to node u.

This problem asks us to generate every possible generalized abbreviation of a given word. A generalized abbreviation is created by replacing some characters in the string with their count, while preserving the order of the remaining characters.

The problem asks us to compute the integer square root of a non negative integer x. More specifically, we need to return the largest integer k such that: This means we are not looking for the exact decimal square root. Instead, we must round down to the nearest integer.

The problem asks us to populate the next pointer for every node in a binary tree so that it points to the node immediately to its right on the same level. If no such node exists, the next pointer should remain NULL.

The problem asks us to determine the number of distinct binary trees that can be constructed from a given array of unique integers, where each integer is strictly greater than 1.

The problem gives us an integer array nums of length n + 1, where every value is guaranteed to be in the range [1, n]. Since there are n + 1 numbers but only n possible distinct values, at least one number must appear more than once. The task is to return that duplicate value.

The problem presents an array nums of length n that is a permutation of integers from 0 to n-1. A global inversion is defined as any pair (i, j) such that i < j and nums[i] nums[j], meaning the earlier element is larger than a later element anywhere in the array.

This problem asks us to identify the seller or sellers who generated the highest total sales revenue. We are given two database tables: Product and Sales. The Product table contains information about products, including their IDs, names, and unit prices.

The problem gives us an array of strings where every string has exactly the same length. If we place all strings vertically, character by character, the strings form a rectangular grid.

We have a set of points on a 2D plane representing cows, each with integer coordinates. Vasya, the shepherd, must walk a closed path around all the cows in such a way that every cow lies strictly inside the path. The goal is to minimize the number of moves needed.

This problem asks us to analyze participation counts for different activities and return only the activities whose parti

The problem asks us to generate every possible full binary tree that contains exactly n nodes. A full binary tree is a special kind of binary tree where every node has either exactly two children or no children at all. In other words, a node can never have only one child.

The problem is a two-player game played on a binary tree, where each player colors nodes starting from an initial chosen node. Player 1 picks a node x and colors it red, while Player 2 picks a different node y and colors it blue.

The problem gives us a string representing a mathematical expression containing non-negative integers, spaces, and the four operators +, -, , and /. Our task is to evaluate the expression and return the resulting integer value.

The problem gives us n nodes labeled from 0 to n - 1. For every node i, we are told which node is its left child and which node is its right child through the arrays leftChild and rightChild. If leftChild[i] = x, then node x is the left child of node i.

This problem asks us to determine whether a car can successfully complete a series of passenger trips without ever exceeding its seating capacity.

We are given a list of people standing in a fixed left-to-right order on a sinking ship. Every person has a name and a role. The evacuation order depends entirely on the role priority. Rats leave first. Women and children share the next priority level. Men leave after them.

In this problem, we are given a two dimensional grid of characters called board and a target string called word. The task is to determine whether the word can be formed by traversing the grid under a strict set of movement rules.

The problem asks us to design two operations for a Binary Search Tree, abbreviated as BST: - serialize(root) converts the BST into a string representation. - deserialize(data) reconstructs the exact same BST from that string.

The problem asks us to find all numbers within a given inclusive range [left, right] that satisfy the definition of a self-dividing number. A self-dividing number has two important properties: 1. Every digit inside the number must divide the number evenly. 2.

The problem gives us a keyboard with four operations: - Press A, which inserts one character 'A' - Press Ctrl-A, which selects everything currently on the screen - Press Ctrl-C, which copies the selected text into a clipboard buffer - Press Ctrl-V, which pastes the clipboard…

The houses and pipes form a directed graph with a very special structure. Every house can have at most one incoming pipe and at most one outgoing pipe. That restriction changes the graph from a general directed graph into a collection of independent chains.

We are given a string and we consider every palindromic substring inside it. Each occurrence matters separately, even if two substrings have the same text. For example, in "aaa" there are three different occurrences of "a".

The problem gives us a triangular array of integers and asks us to compute the minimum path sum from the top row to the bottom row. The input is a two-dimensional array called triangle, where: - The first row contains exactly one number.

We have an n × m grid. Some entire rows are empty, some entire columns are empty, and every empty cell belongs to at least one of those empty rows or empty columns. All remaining cells contain oil.

The problem is asking us to count the number of valid subarrays in a given integer array nums. A subarray is valid if its leftmost element is not larger than any other element in the subarray.

The problem asks us to balance a string composed of exactly four types of characters: 'Q', 'W', 'E', and 'R'. A string is balanced when each character occurs exactly n / 4 times, where n is the length of the string.

This problem asks us to determine whether a string s3 can be formed by interleaving two other strings, s1 and s2. An interleaving means we combine characters from s1 and s2 while preserving the relative order of characters within each original string.

We are asked to find an integer point on a straight line described by the equation Ax + By + C = 0. The inputs are three integers, A, B, and C, which define the slope and position of the line.

We are given the current month as a string and an integer k representing how many months later a new game release will happen. The task is to determine the month after advancing exactly k months forward in the calendar.

This problem asks us to find all repeated DNA subsequences of a fixed length, specifically length 10, inside a given DNA string. The input is a string s, where each character represents a DNA nucleotide.

The problem asks us to maximize the product of an array of non-negative integers after performing at most k increment op

It looks like you want the full detailed solution guide, but the specific LeetCode problem number and statement are missing from your latest request template. You included the formatting instructions and structure, but not which problem to solve beyond prior context.

The problem gives us an integer array arr and an integer k. We are allowed to partition the array into contiguous subarrays where each subarray has length at most k.

The problem gives us an array that was originally sorted in ascending order, but may have been rotated at some pivot point. A rotation means that some prefix of the sorted array was moved to the end while preserving the relative order of elements.

This problem extends the mechanics introduced in earlier Maze problems, but adds two important complications. First, we are no longer looking for a simple reachable or unreachable answer. Instead, we must find the shortest path by travel distance.

We are given a limited stock of T-shirts in five sizes: S, M, L, XL, and XXL. Each participant in the contest has a preferred size. Participants arrive in a fixed order and try to pick the T-shirt closest to their preferred size.

That is a long, detailed reference document with multiple required sections, complete implementations, worked traces, and test coverage. I can provide the full guide in a single response.

This problem asks us to construct a special ordering of all integers from 0 to 2^n - 1. The ordering must satisfy the properties of a circular Gray code sequence.

This is a SQL database problem where we need to calculate the total sales amount per product for each year, even when a

The problem asks us to design a class called SubrectangleQueries that operates on a two dimensional integer matrix, refe

This problem provides a database table named Calls, where each row represents a phone call between two people. The table contains three columns: | Column | Meaning | | --- | --- | | fromid | The caller | | toid | The receiver | | duration | Duration of the call | The important…

We are given several closed intervals on the number line. A nail placed at an integer coordinate covers every segment that contains that coordinate, including endpoints.

This problem gives us a database table named Tweets with two columns: | Column | Description | | --- | --- | | tweetid |

We start with an empty string. The first player picks any single letter that appears somewhere inside at least one dictionary word. After that, players alternately extend the current string by adding exactly one character either to the front or to the back.

The problem asks us to find an index in the array such that the sum of all elements strictly to the left of that index is equal to the sum of all elements strictly to the right of that index. More formally, for an index i: - Left sum = nums[0] + nums[1] + ...

We have an 8 × 8 board. Maria starts in the bottom-left corner, Anna stays permanently in the top-right corner, and several statues occupy other cells. The game proceeds in rounds. Maria moves first, then every statue moves one row downward simultaneously.

The problem asks us to calculate the maximum absolute sum of any contiguous subarray in a given integer array nums. A subarray is a sequence of consecutive elements, and its absolute sum is defined as the absolute value of the sum of all elements in that subarray.

The problem asks us to select three items from a store such that their prices are strictly increasing and their indices

Each bowl is a frustum, a cone with its tip cut off. A bowl is described by its height h, bottom radius r, and top radius R. The bowls are stacked in the given order, always sharing the same vertical axis.

The problem gives us an integer array nums and two fixed subarray lengths, firstLen and secondLen. We must select exactly two contiguous subarrays such that: - One subarray has length firstLen - The other subarray has length secondLen - The two subarrays do not overlap - The…

This problem asks us to find the maximum number of non-overlapping subarrays in a given integer array nums such that the

The problem asks us to determine whether a given matrix satisfies the Toeplitz property. A matrix is considered Toeplitz if every diagonal running from the top-left corner toward the bottom-right corner contains identical values.

The problem gives us an alphanumeric string s that contains only lowercase English letters and digits. Our task is to re

We have a source string s1, which represents the headline of one newspaper. We may take as many copies of this headline as we want and concatenate them together.

The problem is asking us to find the maximum difference between two elements in an array, with the condition that the smaller element appears before the larger element.

The problem asks us to select exactly three non-overlapping subarrays from the input array nums, where each subarray has length k. Among all valid choices, we must maximize the total sum of all elements contained in those three subarrays.

In this problem, we are given an n x n board where each cell contains one of four possible values: - 'E', the ending position located at the top-left corner - 'S', the starting position located at the bottom-right corner - A digit character '1' through '9', representing points…

We are asked to construct a path for an ant on a tree. The tree has n vertices, with vertex 1 as the root, and n-1 edges connecting them so the graph is connected.

The problem asks us to compute the running sum, also called the prefix sum, of a one dimensional integer array. For ever

We are given an absolute Unix-style path. The path is split into components by /, and every component represents either a normal directory or file name, ".", or "..". A normal name means “go into this directory or file”. The component ".

The problem gives an array of strings, and we must arrange them into a circular concatenation while preserving the original order of the strings. For every individual string, we are allowed to either keep it as-is or reverse it before joining it into the loop.

The problem asks us to find the area of the largest rectangle containing only 1s in a binary matrix. The matrix consists of characters '0' and '1', where '1' represents a valid cell that may belong to a rectangle and '0' represents a blocked cell that cannot be included.

The problem asks us to take a valid parentheses string seq and split it into two disjoint subsequences A and B such that each subsequence is itself a valid parentheses string (VPS).

The problem gives us a special type of doubly linked list where every node contains four fields: The next and prev pointers behave exactly like a normal doubly linked list. The extra child pointer introduces another linked list that branches downward from the current node.