import sys; input = sys.stdin.buffer.readline
sys.setrecursionlimit(10**7)
from collections import defaultdict
con = 10 ** 9 + 7; INF = float("inf")

def getlist():
	return list(map(int, input().split()))

#処理内容
def main():
	N, M = getlist()
	edge = []
	ans = [0] * N
	for i in range(M):
		a, b = getlist()
		edge.append([a, b])

	edge.sort()

	for i in range(M):
		a, b = edge[-1 - i]
		if ans[a] == 0 and ans[b] == 0:
			ans[a] = 1

	while True:
		if ans[-1] == 0:
			ans.pop()
		else:
			break

	anspre = "".join(list(map(str, ans)))
	print(anspre[::-1])


if __name__ == '__main__':
	main()