#include <stdio.h>
int main() {
	double t = -233;
	while(1){
		double T;
		scanf("%lf",&T);
		if(T>233)break;
		if(t>-20)printf("%.2lf\n",T-t);
		t=T;
	}
	printf("End of Output\n");
	return 0;
}