import sys

main() {
	x := 0

	if x != x || x != x {
		sys.exit(1)
	}

	if x != x || x != x || x != x {
		sys.exit(1)
	}

	if x == x || x != x {
		if x != x || x == x {
			if x == x || x != x || x != x {
				if x != x || x == x || x != x {
					if x != x || x != x || x == x {
						sys.exit(0)
					}
				}
			}
		}
	}
	
	sys.exit(1)
}