How to show them for negative number my hacker block didnt give me full marks my question is right

#1

import java.util.Scanner;

public class Main {

public static void main(String[] args) {
	// TODO Auto-generated method stub
	Scanner sc = new Scanner(System.in);
	int minf = sc.nextInt();
	int maxf = sc.nextInt();
	int steps = sc.nextInt();
			
	           for(int i = 0; i<=maxf ; i = i+steps)
	           {
	        	   int c = (int) ( (5 / 9.0) * (i - 32 ) );
	        	   System.out.println(i+"\t"+c);
	           }
	      

}

}