import sys

main() {
	correct := 0

	switch {
		1 == 1 { correct += 1 }
	}

	switch {
		1 == 1 { correct += 1 }
		_      { correct -= 1 }
	}

	switch {
		0 == 1 { correct -= 1 }
		_      { correct += 1 }
	}

	switch {
		0 == 1 { correct -= 1 }
		0 == 2 { correct -= 1 }
		_      { correct += 1 }
	}

	switch {
		0 == 1 { correct -= 1 }
		0 == 2 { correct -= 1 }
		2 == 2 { correct += 1 }
		_      { correct -= 1 }
	}

	switch {
		0 == 1 { correct -= 1 }
		0 == 2 { correct -= 1 }
		0 == 3 { correct -= 1 }
	}

	if correct == 5 {
		return
	}

	sys.exit(1)
}