POJ 2871

#include<iostream>

#include<stdio.h>

#include<iomanip>

using namespace std;

int main()

{

	//freopen("acm.acm","r",stdin);

	double tem1;

	double tem2;

	cin>>tem1;

	while(cin>>tem2)

	{

		if(tem2 == 999)

			break;

		cout<<setiosflags(ios::fixed)<<setprecision(2)<<tem2-tem1<<endl;

		tem1 = tem2;

	}

	cout<<"End of Output"<<endl;

}