| | | 1 | | // -------------------------------------------------------------------------------- |
| | | 2 | | // Copyright (C) 2025 Eugene Eremeev (also known as Yevhenii Yeriemeieiv). |
| | | 3 | | // All Rights Reserved. |
| | | 4 | | // -------------------------------------------------------------------------------- |
| | | 5 | | // This software is the confidential and proprietary information of Eugene Eremeev |
| | | 6 | | // (also known as Yevhenii Yeriemeieiv) ("Confidential Information"). You shall not |
| | | 7 | | // disclose such Confidential Information and shall use it only in accordance with |
| | | 8 | | // the terms of the license agreement you entered into with Eugene Eremeev (also |
| | | 9 | | // known as Yevhenii Yeriemeieiv). |
| | | 10 | | // -------------------------------------------------------------------------------- |
| | | 11 | | |
| | | 12 | | namespace LeetCode.Algorithms.CheckIfItIsStraightLine; |
| | | 13 | | |
| | | 14 | | /// <inheritdoc /> |
| | | 15 | | public class CheckIfItIsStraightLineIterative : ICheckIfItIsStraightLine |
| | | 16 | | { |
| | | 17 | | /// <summary> |
| | | 18 | | /// Time complexity - O(n) |
| | | 19 | | /// Space complexity - O(1) |
| | | 20 | | /// </summary> |
| | | 21 | | /// <param name="coordinates"></param> |
| | | 22 | | /// <returns></returns> |
| | | 23 | | public bool CheckStraightLine(int[][] coordinates) |
| | 3 | 24 | | { |
| | 3 | 25 | | var a = coordinates[0]; |
| | 3 | 26 | | var b = coordinates[^1]; |
| | | 27 | | |
| | 3 | 28 | | var dx = b[0] - a[0]; |
| | 3 | 29 | | var dy = b[1] - a[1]; |
| | | 30 | | |
| | 16 | 31 | | for (var i = 1; i < coordinates.Length - 1; i++) |
| | 7 | 32 | | { |
| | 7 | 33 | | var x = coordinates[i][0] - a[0]; |
| | 7 | 34 | | var y = coordinates[i][1] - a[1]; |
| | | 35 | | |
| | 7 | 36 | | if (dx * y != dy * x) |
| | 2 | 37 | | { |
| | 2 | 38 | | return false; |
| | | 39 | | } |
| | 5 | 40 | | } |
| | | 41 | | |
| | 1 | 42 | | return true; |
| | 3 | 43 | | } |
| | | 44 | | } |