HDU 1302――The Snail

这个题目也不是很复杂。一只蜗牛，白天上升一些，晚上下滑一些，每天会因为没有力气而比上一天少爬，求这个蜗牛几天滑到底或者几天滑到顶。简单模拟即可，如果用数学反而麻烦。另外当这个蜗牛上升比下降还快的时候，其实就已经不行了= =#

[cpp]
#include
#include
using namespace std;
int main()
{
double high,up,down,factor;
while(cin>>high>>up>>down>>factor)
{
bool succ=0,fail=0;
int needday=1;
double nowpos=0;
double rate=up*(factor/100.0);
if(high==0)
break;
while(nowpos<=high && nowpos>=0)
{
if(up>0)
nowpos+=up;
if(nowpos>high)
{
succ=1;
break;
}
nowpos-=down;
up-=rate;
if(nowpos<0)
{
fail=1;
break;
}
needday++;
}
if(fail==1)
{
cout<<"failure on day "< }
else if(succ==1)
{
cout<<"success on day "< }

}



return 0;
}

#include
#include
using namespace std;
int main()
{
double high,up,down,factor;
while(cin>>high>>up>>down>>factor)
{
bool succ=0,fail=0;
int needday=1;
double nowpos=0;
double rate=up*(factor/100.0);
if(high==0)
break;
while(nowpos<=high && nowpos>=0)
{
if(up>0)
nowpos+=up;
if(nowpos>high)
{
succ=1;
break;
}
nowpos-=down;
up-=rate;
if(nowpos<0)
{
fail=1;
break;
}
needday++;
}
if(fail==1)
{
cout<<"failure on day "< }
else if(succ==1)
{
cout<<"success on day "< }

}



return 0;
}