hdu 1302(简单模拟题）

题目链接：http://acm.hdu.edu.cn/showproblem.php?pid=1302

思路：直接按着题目意思模拟就行了。。。

#define _CRT_SECURE_NO_WARNINGS
#include<iostream>
#include<cstdio>
#include<cmath>
using namespace std;

int main(){
    double h,u,d,f;
    while(~scanf("%lf",&h)&&h){
        scanf("%lf%lf%lf",&u,&d,&f);
        int day=0;
        bool flag=true;
        double dist=0,s=u*f/100;
        while(1){
            day++;
            dist+=u;
            if(dist>h)break;
            dist-=d;
            if(dist<0){flag=false;break;};
            u-=s;
            if(u<0)u=0;
        }
        if(flag){
            printf("success on day %d\n",day);
        }else 
            printf("failure on day %d\n",day);
    }
    return 0;
}