Introductory Problems | CSES | ahampriyanshu

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Weird Algorithm

Consider an algorithm that takes as input a positive integer n. If n is even, the algorithm divides it by two, and if n is odd, the algorithm multiplies it by three and adds one. The algorithm repeats this, until n is one.

Problem

import java.util.Scanner;
public class Weird_Algorithm {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    long n = sc.nextLong();
    while (n > 1) {
      System.out.print(n + " ");
      n = n % 2 == 0 ? n / 2 : n * 3 + 1;
    }
    System.out.print(n);
  }
}