HDOJ 1049 Climbing Worm

HDACM 1049

import java.util.Scanner;public class Main {    public static void main(String[] args) {        Scanner sc = new Scanner(System.in);        while(sc.hasNext()){            int n = sc.nextInt();            int u = sc.nextInt();            int d = sc.nextInt();            if (n==0&&u==0&&d==0) {                break;            }            double s = 1.0*(n-u)/(u-d);            int ans = (int) s;            if (s-ans>0.0000001) {                System.out.println((ans+1)*2+1);            }else{                System.out.println(ans*2+1);            }        }        sc.close();    }}