main() {
	x := 0

	if x == x && x != x || x != x && x != x {
		exit(1)
	}

	if x != x && x == x || x != x && x != x {
		exit(1)
	}

	if x != x && x != x || x == x && x != x {
		exit(1)
	}

	if x != x && x != x || x != x && x == x {
		exit(1)
	}

	if (x == x || x != x) && (x != x || x != x) {
		exit(1)
	}

	if (x != x || x == x) && (x != x || x != x) {
		exit(1)
	}

	if (x != x || x != x) && (x == x || x != x) {
		exit(1)
	}

	if (x != x || x != x) && (x != x || x == x) {
		exit(1)
	}

	if x != x || x != x || x != x || x == x || x != x {
		if x + 1 == inc(x) && x - 1 == dec(x) && x == dec(inc(x)) {
			if (x == x && x != x || x == x && x == x) && (x == x && x == x || x == x && x != x) {
				exit(0)
			}
		}
	}
	
	exit(1)
}

exit(x) {
	syscall(60, x)
}

inc(x) {
	return x + 1
}

dec(x) {
	return x - 1
}