zoj 1710 The Snail

#include <iostream>using namespace std;int main(){    double fHeightOfWell, fUpDistance, fDownDistance, fFatigueFactor;    int nDay;    while (1)    {        cin >> fHeightOfWell >> fUpDistance >> fDownDistance >> fFatigueFactor;        if (fHeightOfWell == 0)        { break;        }        else        { double nFatigueDistance = (double)fUpDistance * fFatigueFactor / 100; double nHeightFromBottom = 0; nDay = 0; do {     nDay++;     nHeightFromBottom += fUpDistance;     if (nHeightFromBottom > fHeightOfWell)     {         break;     }     else     {         nHeightFromBottom -= fDownDistance;         fUpDistance -= nFatigueDistance;         if (fUpDistance < 0)         {  fUpDistance = 0;         }     } } while (nHeightFromBottom >= 0); if (nHeightFromBottom > 0) {     cout << "success on day " << nDay << endl; } else {     cout << "failure on day " << nDay << endl; }        }    }    return 0;}