ZOJ1710

题意：蜗牛在深为H的井底，白天爬U，晚上掉D，然后每天少爬初始 一天爬高度的10%，问几天爬出井或者到负高度

题解：一天天模拟就好→_→,

#include<bits/stdc++.h>using namespace std;double h,u,d,f;void Gao(){    int day=1;    double height=0.0;    f=u*1.0*f/100.0;    while (true)    {        height+=max(u,0.0);        //cout<<u<<" "<<day<<" "<<height<<endl;        if (height>h)        {            cout<<"success on day "<<day<<endl;            return;        }        u-=f;        height-=d;        if (height<0)        {            cout<<"failure on day "<<day<<endl;            return ;        }        day++;    }}int main(){    //freopen("a.in","r",stdin);    while (cin>>h>>u>>d>>f && h!=0)        Gao();    return 0;}