3516_Find_Closest_Person.swift

/*
 Done 04.09.2025. Revisited: N/A

 You are given three integers x, y, and z, representing the positions of three people on a number line:
 - x is the position of Person 1.
 - y is the position of Person 2.
 - z is the position of Person 3, who does not move.
 Both Person 1 and Person 2 move toward Person 3 at the same speed.

 Determine which person reaches Person 3 first:
 - Return 1 if Person 1 arrives first.
 - Return 2 if Person 2 arrives first.
 - Return 0 if both arrive at the same time.

 Return the result accordingly.

 Example 1:

 Input: x = 2, y = 7, z = 4
 Output: 1
 Explanation:
 - Person 1 is at position 2 and can reach Person 3 (at position 4) in 2 steps.
 - Person 2 is at position 7 and can reach Person 3 in 3 steps.
 - Since Person 1 reaches Person 3 first, the output is 1.

 Example 2:

 Input: x = 2, y = 5, z = 6
 Output: 2
 Explanation:
 - Person 1 is at position 2 and can reach Person 3 (at position 6) in 4 steps.
 - Person 2 is at position 5 and can reach Person 3 in 1 step.
 - Since Person 2 reaches Person 3 first, the output is 2.

 Example 3:

 Input: x = 1, y = 5, z = 3
 Output: 0
 Explanation:
 - Person 1 is at position 1 and can reach Person 3 (at position 3) in 2 steps.
 - Person 2 is at position 5 and can reach Person 3 in 2 steps.
 - Since both Person 1 and Person 2 reach Person 3 at the same time, the output is 0.
 */

import Foundation

class P3516 {

    // MARK: - Option 1 (my). Time: O(?). Memory: O(?)

    func findClosest1(_ x: Int, _ y: Int, _ z: Int) -> Int {
        let diff1 = abs(x - z)
        let diff2 = abs(y - z)
        if (diff1 < diff2) {
            return 1
        } else if (diff1 > diff2) {
            return 2
        } else {
            return 0
        }
    }

    // MARK: - Option 2. Time: O(?). Memory: O(?)

    func findClosest2(_ x: Int, _ y: Int, _ z: Int) -> Int {
        return 0
    }

}