Fibonacci数列

没啥可以优化的，送分题

package Interview2017.wangyi.No3;
import java.util.Scanner;
public class Main{
    public static void main(String[] args){
        Scanner in = new Scanner(System.in);
        int num = in.nextInt();
        int steps = 0;
        int pre = 0,next = 1,temp = -1;
        while(next < num){
            temp = pre+next;
            pre = next;
            next = temp;
        }
        steps = ((num - pre) < (next - num)) ? (num-pre) : (next-num);
        System.out.println(steps);
    }
}