/**
 * rudimentary.c
 */
 
#include <stdio.h>

int main () {
	double sum, v;
	
	sum = 0;
    // compile time warning and run time segment fault; should be scanf("%lf", &v)
	while (scanf("%lf", &v) == 1)
		printf("\t%.2f\n", sum +=v);
	return 0;
}