pku acm 1003

#include<iostream>

using namespace std;

int main(){

float length,temp;

int maxNum(0);

while(cin>>length){

while(length>0){

++maxNum;

temp=1.0f/(maxNum+1);

length-=temp;

}

if(maxNum!=0){

cout<<maxNum<<" card(s)"<<endl;

maxNum=0;

}

else

break;

}

return 0;

}