We can prove that 59 is indeed the minimal possible sum. Example 1: Input: c = 5 Output: true Explanation: 1 * 1 + 2 * 2 = 5 Example 2: Input: c = 3 Output: false Constraints: * 0 <= c <= 231 - 1 Determine Color of a Chessboard Square - LeetCode. Since the answer may be large, return it modulo 109 + 7. Valid Square - Level up your coding skills and quickly land a job. e (10. 1536. 963. 26100 Input: arr = [4,2,1,3] Output: [[1,2],[2,3],[3,4]] Explanation: The minimum absolute difference is 1. Otherwise, create a new 0-indexed integer array newNums of leng Example 1: Input: nums = [4,2,5,3] Output: 7 Explanation: It is optimal to choose the subsequence [4,2,5] with alternating sum (4 + 5) - 2 = 7. Minimum Swaps to Arrange a Binary Grid. However, a square plot of side length 2 has 12 apples inside (as depicted in the image above). You can move up, down, left, or right from and to an empty cell. Can you solve this real interview question? Transform to Chessboard - You are given an n x n binary grid board. Given a list of stones positions (in units) in sorted ascending order, determine if the frog can cross the river by landing on the last stone 695. Return the minimum score of nums after changing the values at each index. Return the minimum area of a rectangle formed from these points, with sides parallel to the X and Y axes. May 6, 2021 路 馃殌 https://neetcode. Output: 16. Example 2: Input: num = 687. The distance between two adjacent cells is 1. Here's my recursive top-down approach: import math. An island is a group of 1 's (representing land) connected 4-directionally (horizontal or vertical. Minimum Difference Between Largest and Smallest Value in Three Moves 1510. There is 1 square of side 3. Number of Substrings With Only 1s 1514. You are given an n x n integer matrix grid where each value grid[i][j] represents the elevation at that point (i, j). com for a richer experience. Example 1: Input: s = "0100" Output: 1 Explanation: If you change the last character to '1', s will be "0101", which is alternating. For example, if you have a rectangle [4,6], you can cut it to get a square with a side length of at most 4. , clockwise order). Thus we have to remove 1 element from nums and divide the array into two equal parts. Valid Square - LeetCode Minimum Number of Visited Cells in a Grid - Level up your coding skills and quickly land a job. , grid[m - 1][n - 1]). Minimum Path Sum - Given a m x n grid filled with non-negative numbers, find a path from top left to bottom right, which minimizes the sum of all numbers along its path. gg/ddjKRXPqtk馃惍 S Maximal Square - Level up your coding skills and quickly land a job. You may return the answer in any order. length, change nums [i] to be either nums [i] + k or nums [i] - k. Example 1: Input: n = 12 Output: 3 Feb 8, 2024 路 Can you solve this real interview question? Perfect Squares - Given an integer n, return the least number of perfect square numbers that sum to n. Sum of Square Numbers - LeetCode The minimum of the sum of square difference will be: (2 - 5)2 + (4 - 8)2 + (10 - 7)2 + (12 - 9)2 = 43. Return the minimum total cost of the cuts. For each index i where 0 <= i < nums. Example 2: Input: neededApples = 13. Let maxLen be the side length of the largest square you can obtain from any of the given rectangles. Can you solve this real interview question? Minimum Absolute Sum Difference - You are given two positive integer arrays nums1 and nums2, both of length n. class Solution: def numSquares(self, n: int) -> int: dp = [math. Mar 9, 2022 路 I'm trying to solve the problem of finding the minimum number of perfect squares (i. That is, if you are in cell (x, y) such that x < m - 1, you can move to any of the cells (x + 1, 0), (x + 1, 1), , (x + 1, n - 1). Example 1: Output: 4. com/neetcode1馃シ Discord: https://discord. The resulting array is nums = [3,3,2,4,2,3,4]. There are n + 1 taps located at points [0, 1, , n] in the garden. Can you solve this real interview question? Binary Search - Given an array of integers nums which is sorted in ascending order, and an integer target, write a function to search target in nums. Constraints: 10 <= num <= 10 9. You can move according to these rules: move diagonally sqrt(2) units (in other words, move one unit vertically then one unit horizontally in 1 second). Maximum Side Length of a Square with Sum Less than or Equal to Threshold. An obstacle and space are marked as 1 or 0 respectively When you cut a stick, it will be split into two smaller sticks (i. Given an n x n binary grid, in one step you can choose two adjacent rows of the grid and swap them. Example 1: Input: packages = [2,3,5], boxes = [[4,8],[2,8]] Output: 6 Explanation: It is optimal to choose the first supplier, using two size-4 Can you solve this real interview question? Perfect Squares - Level up your coding skills and quickly land a job. dp[1] = 1. ) You may assume all four edges of the grid are surrounded by water. Explanation: 100 can be written as 102. 2 (squares of 1x1 ) 1 (square of 2x2) Example 2: Input: n = 5, m = 8. Example 1: Input: n = 2, m = 3. the sum of their lengths is the length of the stick before the cut). Example 2: Input: matchsticks = [3,3,3,3,4] Output: false. - If we remove nums [0] = 3, the array will be [1,2]. 00000 Example 2: Input: x = 2. Return true if you can make this square and false otherwise Can you solve this real interview question? Minimum Obstacle Removal to Reach Corner - You are given a 0-indexed 2D integer array grid of size m x n. Maximal Square - LeetCode Unique Paths II - You are given an m x n integer array grid. There is a robot initially located at the top-left corner (i. Number of Good Pairs 1513. If the task is impossible, return -1. Example 2: Output: 16. Can you solve this real interview question? Minimum Falling Path Sum II - Level up your coding skills and quickly land a job. The frog can jump on a stone, but it must not jump into the water. . Let n be the length of nums. Can you solve this real interview question? Determine Color of a Chessboard Square - Level up your coding skills and quickly land a job. Minimum Area Rectangle - You are given an array of points in the X-Y plane points where points[i] = [xi, yi]. Given an integer n and an integer array ranges of length n + 1 where ranges [i] (0-indexed) means the i-th tap can water the area [i - ranges [i], i + ranges [i]] if it was open. The minimum number for 1 is 1, as 1 itself is a perfect square. Minimum Domino Rotations For Equal Row. You can move up, down, left, or right from and to an empty cell in one step. pepcoding. 1293. Example 2: Input: n = 13 Output: 2 Explanation: 13 = 4 + 9. Can you solve this real interview question? Maximal Square - Given an m x n binary matrix filled with 0's and 1's, find the largest square containing only 1's and return its area. Example 3: Input: s = "1111" Output: 2 Explanation: You need two Can you solve this real interview question? K Closest Points to Origin - Level up your coding skills and quickly land a job. Back to Explore Page. Each solution contains a distinct board configuration of the n-queens' placement, where 'Q' and '. A perfect square is an integer that is the square of an integer; in other words, it is the product of some integer with itself. Note that after each query the array is reset to its original state. Note: You can only move either down or right at any point in time. Input: n = 6. Medium. Return the minimum number of taps that should be open to water the whole garden, If the garden Can you solve this real interview question? Shortest Path in a Grid with Obstacles Elimination - You are given an m x n integer matrix grid where each cell is either 0 (empty) or 1 (obstacle). Maximal Square - Level up your coding skills and quickly land a job. Example 1: Input: nums = [2,3,3,2,2,4,2,3,4] Output: 4. The first integer of each row is greater than the last integer of the previous row. ' both 74. Shortest Path in a Grid with Obstacles Elimination. , √(x1 - x2)2 + (y1 - y2)2). The robot is initially located at the top-left corner (i. crio. Can you solve this real interview question? Minimum Sum of Squared Difference - Level up your coding skills and quickly land a job. Can you solve this real interview question? Minimum Path Cost in a Grid - You are given a 0-indexed m x n integer matrix grid consisting of distinct integers from 0 to m * n - 1. A chessboard board is a board where no 0's and no 1's are 4 Apr 23, 2019 路 Given a rectangle of size n x m, return the minimum number of integer-sided squares that tile the rectangle. The distance between two points on the X-Y plane is the Euclidean distance (i. Feb 13, 2023 路 For above board optimal way to cut into square is: Total minimum cost in above case is 42. Specifically, the next element from position (row, col) will be (row + 1 Output: 59. In the first impression, this problem may be solved by 3 different approaches: Can you solve this real interview question? Count Square Submatrices with All Ones - Given a m * n matrix of ones and zeros, return how many square submatrices have all ones. Total number of squares = 10 + 4 + 1 = 15 Return the minimum cost to make all points connected. 279. , (n - 1, n - 1)) such that: * All the visited cells of the path are 0. You are given an m x n integer matrix matrix with the following two properties: Each row is sorted in non-decreasing order. 1007. Return true if you can make this square and false otherwise. (A domino is a tile with two numbers from 1 to 6 - one on each half of the tile. Given an integer target, return true if target is in matrix or false otherwise. Example 1: Input: matrix = [ [0,1,1,1], [1,1,1,1], [0,1,1,1] ] Output: 15 Explanation: There are 10 squares of side 1. Intuitions, example walk through, and complexity analysis. Output: 5040. Sep 5, 2023 路 Given a number n, find the minimum number of squares that sum to X. Given the two integers m and n, return the number of possible unique paths that Nov 24, 2016 路 LeetCode – Minimum Area Rectangle (Java) November 24, 2016 by ProgramCreek. It is. Return the maximum area of a square field that can be formed by removing some fences (possibly none) or -1 if it is impossible to make a square field. Explanation: You cannot find a way to form a square with all the Can you solve this real interview question? Unique Paths - There is a robot on an m x n grid. - Multiply the 2 elements in the first column by -1. You are given a 0-indexed n x n integer matrix grid where grid[r][c] represents the height of the building located in the block at row r and column c. Example 3: Input: neededApples = 1000000000. Given a number N. Return the minimum number of steps to walk from the upper left corner (0, 0) to the lower right corner (m - 1, n - 1) given Minimum Moves to Spread Stones Over Grid - LeetCode. Maximal Square - LeetCode Can you solve this real interview question? N-Queens - The n-queens puzzle is the problem of placing n queens on an n x n chessboard such that no two queens attack each other. 807. Minimum Number of Visited Cells in a Grid - LeetCode Jun 27, 2020 路 This video explains an important programming interview problem which is to find the minimum number of sqaures which can be added to form a givennumber N. A clear path in a binary matrix is a path from the top-left cell (i. Can you solve this real interview question? Minimum Score Triangulation of Polygon - Level up your coding skills and quickly land a job. You are given a parentheses string s. Can you solve this real interview question? Frog Jump - A frog is crossing a river. Example 2: Input: nums = [5,6,7,8] Output: 8 Explanation: It is optimal to choose the subsequence [8] with alternating sum 8. A falling path starts at any element in the first row and chooses the element in the next row that is either directly below or diagonally left/right. Cost 4 Vertical cut Cost = 4 + 4*2 = 12. Explanation: We can apply the following operations to make the array empty: - Apply the first operation on the elements at indices 0 and 3. Explanation: 12 = 4 + 4 + 4. Can you solve this real interview question? Minimum Moves to Spread Stones Over Grid - Level up your coding skills and quickly land a job. Explanation: You can form a square with length 2, one side of the square came two sticks with length 1. ) that sum up to n. Hard. By considering different combinations of perfect squares, Can you solve this real interview question? Matrix Block Sum - Given a m x n matrix mat and an integer k, return a matrix answer where each answer[i][j] is the sum of all elements mat[r][c] for: * i - k <= r <= i + k, * j - k <= c <= j + k, and * (r, c) is a valid position in the matrix. Cost 4 Horizontal cut Cost = 0 + 4*1 = 4. Explanation: We can follow the following steps to reach sum equals 4: - Multiply the 2 elements in the first row by -1. Apply the following algorithm on nums:. Note that, there are other ways to obtain the minimum of the sum of square difference, but there is no way to obtain a sum smaller than 43. For Example: If N = 100, N can be expressed as (10*10) and also as (5*5 + 5*5 + 5*5 + 5*5) but the output will be 1 as the minimum number of square is 1, i. Example 2: Input: nums = [1,2,3,4,5], k = 2 Output: 9 Explanation Implement pow(x, n), which calculates x raised to the power n (i. In a row of dominoes, tops[i] and bottoms[i] represent the top and bottom halves of the i th domino. Note: The field is surrounded by two horizontal fences from the coordinates (1, 1) to (1, n) and (m, 1) to (m, n) and two vertical fences The minimum of the sum of square difference will be: (2 - 5)2 + (4 - 8)2 + (10 - 7)2 + (12 - 9)2 = 43. For example, 1, 4, 9, and 16 are perfect squares while 3 and 11 are not. Notice that there is a unique path between every 1292. The absolute sum difference of arrays nums1 and nums2 is defined as the sum of |nums1[i] - nums2[i]| for each 0 <= i < n (0-indexed). Note LeetCode Solutions in C++20, Java, Python, Minimum Number Game Maximum Square Area by Removing Fences From a Field Nov 24, 2023 路 For example, the minimum number of perfect squares needed to sum up to 0 is 0 (no squares needed). Return the minimum difference possible between the sums of the two parts after the removal of n elements. Search a 2D Matrix. Example 1: Output: 3. io/ - A better way to prepare for Coding Interviews馃惁 Twitter: https://twitter. Some valid and invalid cuts are shown in You are given a 0-indexed integer array nums whose length is a power of 2. The river is divided into some number of units, and at each unit, there may or may not exist a stone. You then decide to move to square 17 and must take the snake to square 13. Example 1: Output: [14,10] Explanation: For the first query we can do the following operations: - Decrease nums[0] 2 times, so that nums = [1 Can you solve this real interview question? 01 Matrix - Given an m x n binary matrix mat, return the distance of the nearest 0 for each cell. Given an array of integers heights representing the histogram's bar height where the width of each bar is 1, return the area of the largest rectangle in the histogram. Example 1: Input: nums = [7,2,5,10,8], k = 2 Output: 18 Explanation: There are four ways to split nums into two subarrays. In case there are multiple rows that have the maximum count of ones, the row with the smallest row number should be selected. Return an array answer of size m where answer[i] is the minimum number of operations to make all elements of nums equal to queries[i]. Return the minimum total wasted space by choosing the box supplier optimally, or -1 if it is impossible to fit all the packages inside boxes. Analysis. Initial Value : Total_cost = 0. Maximal Square - LeetCode Minimum Operations to Make All Array Elements Equal - Level up your coding skills and quickly land a job. Return the minimum area of any rectangle formed from these points, with sides not necessarily parallel to the X and Y axes. In-depth solution and explanation for LeetCode 221. Example 2: Explanation: A square plot of side length 1 does not contain any apples. Minimum Score Triangulation of Polygon - LeetCode. Jun 30, 2022 路 In this Video, we are going to learn about Dynamic Programming. All points are connected if there is exactly one simple path between any two points. The possible movements of chess knight are shown in this diagram: A chess knight can move as indicated in the chess diagram below: [https Can you solve this real interview question? Minimum Cuts to Divide a Circle - A valid cut in a circle can be: * A cut that is represented by a straight line that touches two points on the edge of the circle and passes through its center, or * A cut that is represented by a straight line that touches one point on the edge of the circle and its center. The robot tries to move to the bottom-right corner (i. com A subarray is a contiguous part of the array. Please consume this content on nados. The perimeter is 2 * 4 = 8. , grid [m - 1] [n - 1]). Example 1: Input: x = 2. You can move in this matrix from a cell to any other cell in the next row. Note that the same perfect square can be used multiple times. Please refer to the first example for a better explanation. A city's skyline is the Sep 4, 2016 路 Welcome to Subscribe On Youtube 279. A falling path with non-zero shifts is a choice of exactly one element from each row of grid such that no two elements chosen in adjacent rows are in the same column. Maximal Square in Python, Java, C++ and more. 00000, n = 10 Output: 1024. Perfect Squares Description Given an integer n, return the least number of perfect square numbers that sum to n. gg/ddjKRXPqtk馃惍 S 778. The main diagonal of Matchsticks to Square - Level up your coding skills and quickly land a job. You want to use all the matchsticks to make one square. At time t, the depth of the water everywhere is t. ) We may rotate the i th domino, so that tops[i] and bottoms[i] swap values. A grid is said to be valid if all the cells above the main diagonal are zeros. . Example 1: Input: matchsticks = [1,1,2,2,2] Output: true. If n == 1, end the process. Reformat Date 1508. Return the minimum number of operations required to make the array empty, or -1 if it is not possible. You will triangulate the polygon into n - 2 triangles. For each triangle, the value of that triangle is the product of the Minimum Falling Path Sum II - Given an n x n integer matrix grid, return the minimum sum of a falling path with non-zero shifts. We will iterate through all numbers from 1 to n and update the dp[] array based on the minimum sum achievable. Example 1: Input: n = 12 Output: 3 Explanation Can you solve this real interview question? Knight Dialer - The chess knight has a unique movement, it may move two squares vertically and one square horizontally, or two squares horizontally and one square vertically (with both forming the shape of an L). evaluated using following steps. Output: 75. List all pairs with difference equal to 1 in ascending order. Minimum Possible Integer After at Most K Adjacent Swaps On Digits 1507. We c Minimum Falling Path Sum II - LeetCode. Smallest Range II - You are given an integer array nums and an integer k. Explanation: 3 squares are necessary to cover the rectangle. Return the maximum sum of the matrix's elements using the operation mentioned above. You then decide to move to square 36, ending the game. Return the minimum number of operations needed to make s alternating. 53. Return the minimum number of moves to transform the board into a chessboard board. Example 1: Input: nums = [3,1,2] Output: -1 Explanation: Here, nums has 3 elements, so n = 1. The answer is Can you solve this real interview question? Sum of Square Numbers - Given a non-negative integer c, decide whether there're two integers a and b such that a2 + b2 = c. Can you solve this real interview question? K Closest Points to Origin - Given an array of points where points[i] = [xi, yi] represents a point on the X-Y plane and an integer k, return the k closest points to the origin (0, 0). Feb 8, 2024 路 A perfect square is an integer that is the square of an integer; in other words, it is the product of some integer with itself. You are given an integer array values where values[i] is the value of the ith vertex (i. If there is no clear path, return -1. Swim in Rising Water. Given an m x n 2D binary grid grid which represents a map of '1' s (land) and '0' s (water), return the number of islands. Range Sum of Sorted Subarray Sums 1509. Example 3: Input: nums = [6,2,1,2,4,5] Output: 10 Explanation: It is optimal Can you solve this real interview question? Row With Maximum Ones - Given a m x n binary matrix mat, find the 0-indexed position of the row that contains the maximum count of ones, and the number of ones in that row. 200. Can you solve this real interview question? Minimum Score Triangulation of Polygon - You have a convex n-sided polygon where each vertex has an integer value. Return the minimum number of obstacles to remove so you can move from Menu. There is a city composed of n x n blocks, where each block contains a single building shaped like a vertical square prism. You have to visit the points in the same order as they appear in the array. Example 1: Input: n = 12 Output: 3 Explanation: 12 = 4 + 4 + 4. Number of Islands. 5%. Minimum Area Rectangle II. Find the minimum number of squares of any number that sums equal to N. Can you solve this real interview question? Minimum Number of Frogs Croaking - Level up your coding skills and quickly land a job. 馃殌 https://neetcode. You should not break any stick, but you can link them up, and each matchstick must be used exactly one time. The robot can only move either down or right at any point in time. Jun 18, 2018 路 Welcome to Subscribe On Youtube 931. Note that 100 can also be written as 52 + 52 + 52 + 52, but this representation requires 4 squares. You can replace at most one element of nums1 with any other element in nums1 to minimize the absolute sum Can you solve this real interview question? Matchsticks to Square - You are given an integer array matchsticks where matchsticks[i] is the length of the ith matchstick. 1505. This is the best place to expand your knowledge and get prepared for your next interview. Stone Game IV 1512. Example 1: Input: n = 7, cuts = [1,3,4,5] Output: 16. Example 1: Input: points = [[0,0],[2,2],[3,10],[5,2],[7,0]] Output: 20 Explanation: We can connect the points as shown above to get the minimum cost of 20. , x n). Minimum Operations to Make All Array Elements Equal - LeetCode Can you solve this real interview question? Minimum Add to Make Parentheses Valid - A parentheses string is valid if and only if: * It is the empty string, * It can be written as AB (A concatenated with B), where A and B are valid strings, or * It can be written as (A), where A is a valid string. Given a set of points in the x and y axes, determine the minimum area of a rectangle formed from these points, with sides parallel to the x and y axes. Max Area of Island. Output: 1. 10000, n = 3 Output: 9. In each move, you can swap any two rows with each other, or any two columns with each other. You can cut the ith rectangle to form a square with a side length of k if both k <= li and k <= wi. , grid [0] [0]). Each cell has one of two values: * 0 represents an empty cell, * 1 represents an obstacle that may be removed. Example 2: Input: s = "10" Output: 0 Explanation: s is already alternating. This Video marks the start of India's Biggest DP Series. e. Dec 3, 2023 路 Return the minimum time in seconds to visit all the points in the order given by points. You can swim from a square to another 4-directionally adjacent square if and only if the elevation of both squares 279 Perfect squares · LeetCode Solutions. Max Increase to Keep City Skyline. There are 4 squares of side 2. Return the minimum number of steps needed to make the grid valid, or -1 if the grid cannot be valid. If there is not any such rectangle, return 0. You are given an m x n binary matrix grid. The rain starts to fall. In one move, you can insert a parenthesis at any position of Test Result. The Perfect Squares LeetCode Solution – “Perfect Squares” states that given an integer n and you need to return the minimum number of perfect squares whose sum equals to n. Minimum Falling Path Sum Description Given an n x n array of integers matrix, return the minimum sum of any falling path through matrix. Since the answer may be large, return it modulo 10 9 + 7. For example, given n = 12, return 3 because 12 = 4 + 4 + 4; given n = 13, return 2 because 13 = 4 + 9. , grid[0][0]). inf] * (n + 1) dp[0] = 0. Visit Crio: https://www. You are given an array of points in the X-Y plane points where points[i] = [x i, y i]. You then decide to move to square 14 and must take the ladder to square 35. The area of an island is the number of cells with a value 1 in the island. An island is surrounded by water and is formed by connecting adjacent lands horizontally or vertically. Output: 3. Explanation: We can split 687 so that num1 is 68 and num2 is 7, which would give an optimal sum of 75. Given an integer n, return all distinct solutions to the n-queens puzzle. The best way is to split it into [7,2,5] and [10,8], where the largest sum among the two subarrays is only 18. The score of nums is the difference between the maximum and minimum elements in nums. You may assume all four edges of the grid are all surrounded by water. Given a positive integer n, find the least number of perfect square numbers (for example, 1, 4, 9, 16, ) which sum to n. Return an array containing the index of the row, and Minimum Number of Frogs Croaking - LeetCode. Total_cost = Total_cost + edge_cost * total_pieces. Solution 1. , (0, 0)) to the bottom-right cell (i. 1, 2, 4, 9. Examples : Input: n = 100. Example: Input: n = 12 Output: 3. This is the lowest possible number of moves to reach the last square, so return 4. Minimum Sum of Squared Difference - LeetCode. Shortest Path in Binary Matrix - Given an n x n binary matrix grid, return the length of the shortest clear path in the matrix. It is necessary to solve the questions while watching videos, nados. Better than official and forum solutions. do/redee Given an integer n, return the least number of perfect square numbers that sum to n. Explanation: We can split 4325 so that num1 is 24 and num2 is 35, giving a sum of 59. Perfect Squares. Explanation: Sum of Square Numbers - Level up your coding skills and quickly land a job. ti lo dj tu yu bq vc di fk lv