java) 전역변수에 예외가 존재하나요?

import java.io.IOException;
import java.util.Scanner;
 
public class Main {
 
	public static int ans = 0;
	public static int n;
 
	static void dyn(int n) {
		if (n % 3 == 0) {
			ans++;
			n = n / 3;
		} else if (n % 2 == 0) {
			ans++;
			n = n / 2;
			System.out.println(n);
		} else {
			ans++;
			n = n - 1;
		}
	}
 
	public static void main(String[] args) throws IOException {
		// TODO Auto-generated method stub 0(48) 소문자(49, 74) 대문자(17, 42) 띄어쓰기(-16)
		Scanner in = new Scanner(System.in);
		StringBuilder sb = new StringBuilder();
 
		n = in.nextInt();
 
		dyn(n);
 
		System.out.print(n);
 
	}
}