import sys
sys.setrecursionlimit(10000000)
MOD = 10 ** 9 + 7
INF = 10 ** 15

def main():
    N,M = map(int,input().split())
    G = [[] for _ in range(N)]
    buy = [1] * M
    for i in range(M):
        a,b = map(int,input().split())
        G[a].append((b,i))
        G[b].append((a,i))
    
    ans = 0
    for i in range(N - 1,-1,-1):
        flag = False
        for e,j in G[i]:
            if buy[j] == 0:
                flag = True
                break
            else:
                buy[j] = 0
        if flag:
            ans ^= 1<<i
            for e,j in G[i]:
                buy[j] = 1
    print(bin(ans)[2:])
if __name__ == '__main__':
    main()