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q1232.swift
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q1232.swift
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//
// q1232.swift
// LeetcodeSwift
//
// Created by NowOrNever on 08/05/2020.
// Copyright © 2020 DL. All rights reserved.
//
import Foundation
//1232. Check If It Is a Straight Line
//Easy
//
//208
//
//28
//
//Add to List
//
//Share
//You are given an array coordinates, coordinates[i] = [x, y], where [x, y] represents the coordinate of a point. Check if these points make a straight line in the XY plane.
//
//
//
//
//
//Example 1:
//
//
//
//Input: coordinates = [[1,2],[2,3],[3,4],[4,5],[5,6],[6,7]]
//Output: true
//Example 2:
//
//
//
//Input: coordinates = [[1,1],[2,2],[3,4],[4,5],[5,6],[7,7]]
//Output: false
//
//
//Constraints:
//
//2 <= coordinates.length <= 1000
//coordinates[i].length == 2
//-10^4 <= coordinates[i][0], coordinates[i][1] <= 10^4
//coordinates contains no duplicate point.
//Accepted
//31,820
//Submissions
//65,802
class q1232Solution {
func checkStraightLine(_ coordinates: [[Int]]) -> Bool {
let originX = coordinates[0][0]
let originY = coordinates[0][1]
let ratio = Float(coordinates[coordinates.count - 1][1] - originY) / Float(coordinates[coordinates.count - 1][0] - originX)
for i in 1..<coordinates.count-1 {
if Float(coordinates[i][1] - originY) / Float(coordinates[i][0] - originX) != ratio{
return false
}
}
return true
}
}
func q1232() -> () {
let solution = q1232Solution()
let coordinates = [[1,1],[2,2],[3,4],[4,5],[5,6],[7,7]]
let result = solution.checkStraightLine(coordinates)
print(result)
}