smohammadhn/gist:d8710936da66dde4dc2246bbf751559c

## gistfile1.txt
def change(string):
    arr = ""
    for char in string:
        if char == "0":
            arr += "1"
        else:
            arr += "0"
    return arr


l, r = map(int, input().split())
my_string = "1"
for i in range(r):
    my_string += change(my_string)

print(my_string[l - 1:r])
	def change(string):
	arr = ""
	for char in string:
	if char == "0":
	arr += "1"
	else:
	arr += "0"
	return arr


	l, r = map(int, input().split())
	my_string = "1"
	for i in range(r):
	my_string += change(my_string)

	print(my_string[l - 1:r])