#include <zlib.h>
#include <stdio.h>
#include <assert.h>

#ifndef BUFSIZE
#define BUFSIZE BUFSIZ
#endif

int main()
{
	char buf[BUFSIZE];
	gzFile gz = gzdopen(fileno(stdout), "w9");
	assert(gz);
	int n;
	while ((n = fread(buf, 1, sizeof(buf), stdin))) {
		int m = gzwrite(gz, buf, n);
		assert(n == m);
		gzflush(gz, Z_SYNC_FLUSH);
	}
	gzclose(gz);
	return 0;
}