#include <stdio.h>
#include <unistd.h>

#define BUF_SIZE 1024

int main (int argc, const char* argv[])
{
	int n;
	char buff[BUF_SIZE];

	while ((n = read(STDIN_FILENO, buff, BUF_SIZE)) > 0)
		if (write(STDOUT_FILENO, buff, n) != n)
			return 1;
	if (n < 0)
		return 2;
	return 0;
}