HDU 1056 HangOver

简单题目，，，不做解释

#include<iostream>using namespace std;int main(){    int n;    double sum;    double len;    while(cin>>len)    {        if(len==0)break;        sum=0;        n=0;        while(sum<len)        {            n++;            sum+=1.0/(n+1);        }          cout<<n<<" card(s)"<<endl;     }    return 0;      }