Tkachov

from fractions import Fraction

def is_straight(z):
	rows = len(z)
	for i in range(1, rows):
		if z[i][0] < 0:
			return False
	return True

def is_dual(z):

Tkachov

native/pre do
    ##include <cstdio>
end

native @nohold _printf();

class Class1 with do end
class Class2 with do end
class Class3 with do end
class Class4 with do end