#include <stdio.h>
#include <ctype.h>
#include <math.h>

#define MAXLINE 128

int
get_line(char s[], int lim)
{
	int c, i;
	i = 0;
	while (--lim > 0 && (c = getchar()) != EOF && c != '\n') {
		s[i++] = c;
	}
	if (c == '\n') {
		s[i++] = c;
	}
	s[i] = '\0';
	return i;
}

/* convert string to double-precision floating point */
double
atof(char s[])
{
	double val, power;
	int i, sign;
	for (i = 0; isspace(s[i]); ++i);
	sign = (s[i] == '-') ? -1 : 1;
	if (s[i] == '+' || s[i] == '-') {
		++i;
	}
	for (val = 0.0; isdigit(s[i]); ++i) {
		val = 10.0 * val + (s[i] - '0');
	}
	if (s[i] == '.') {
		++i;
	}
	for (power = 1.0; isdigit(s[i]); ++i) {
		val = 10.0 * val + (s[i] - '0');
		power *= 10.0;
	}
	if (s[i] == 'e' || s[i] == 'E') {
		return sign * val / power * pow(10, s[++i] - '0');
	}
	return sign * val / power;
}

int
main()
{
	double sum;
	char line[MAXLINE];
	sum = 0;
	while (get_line(line, MAXLINE) > 0) {
		printf("\t%g\n", sum += atof(line));
	}
	return 0;
}