import sys
input = sys.stdin.readline

N, M = map(int, input().split())
G = [[] for i in range(N)]
for i in range(M):
    A, B = map(int, input().split())
    G[A].append((B, i))
    G[B].append((A, i))
    
seenV, seenE = [0] * N, [0] * M
ans = [0] * N
for i in range(N - 1, -1, -1):
    if seenV[i]:
        continue
    seenV[i] = 1
    temp = []
    for u, ind in G[i]:
        if seenE[ind]:
            continue
        temp.append(u)
        seenE[ind] = 1
    if temp:
        for u in temp:
            seenV[u] = 1
            ans[u] = 1
            
while True:
    if ans[-1] == 0:
        ans.pop()
    else:
        break
ans.reverse()

print(*ans, sep="")