#include <iostream>
#include <math.h>

// This method is not as good as the one in 1.cc because using modf
// requires pointers, which haven't been covered yet and are easy
// to get wrong.  Using the example code from the math.h reference
// should be okay though.

long round(double x) {
	if (x < 0) {
		return -round(-x);
	}

	double intpart;
	double fractional = modf(x, &intpart);

	if (fractional >= 0.5) {
		return static_cast<long>(ceil(x));
	} else {
		return static_cast<long>(floor(x));
	}
}

int main() {
	double number;

	while (std::cin >> number) {
		std::cout << round(number) << std::endl;
	}
}