寒假之作—HDU—虫子爬井问题

/*
 * Copyright (c) 2014, 烟台大学计算机学院
 * All rights reserved.
 * 文件名称：test.cpp
 * 作    者：李晓凯
 * 完成日期：2015年 1 月 20 日
 * 版 本 号：v1.0

 *

Problem Description

An inch worm is at the bottom of a well n inches deep. It has enough energy to climb u inches every minute, but then has to rest a minute before climbing again. During the rest, it slips down d inches. The process of climbing and resting then repeats. How long before the worm climbs out of the well? We'll always count a portion of a minute as a whole minute and if the worm just reaches the top of the well at the end of its climbing, we'll assume the worm makes it out.

Input

There will be multiple problem instances. Each line will contain 3 positive integers n, u and d. These give the values mentioned in the paragraph above. Furthermore, you may assume d < u and n < 100. A value of n = 0 indicates end of output.

Output

Each input instance should generate a single integer on a line, indicating the number of minutes it takes for the worm to climb out of the well.

Sample Input

10 2 1
20 3 1
0 0 0

Sample Output

17
19

#include 
using namespace std;
int main()
{
    int x,y,z;
    while(cin>>x>>y>>z&&x!=0&&y!=0&&z!=0)
    {
        int i=0,j=0,k=0;
        if(x+y+z==0)
            break;
        i=y-z;
        j=x-y;
        if(j%i==0)
        {
            k=2*(j/i);
            k++;
        }
        else
        {
            k=2*(j/i+1)+1;
        }
        cout<

学习总结：感觉看这个题目好吃力啊，看来要好好学英语了，才能更顺利的学习编程。恩，加油！！！