#!/usr/bin/env pypy3


def main():
    n, m = (int(x) for x in input().split())
    adj_vs = [[] for _ in range(n)]
    for _ in range(m):
        a, b = (int(x) for x in input().split())
        adj_vs[a].append(b)
        adj_vs[b].append(a)
    for vs in adj_vs:
        vs.sort(reverse=True)
    needed = [False for _ in range(n)]
    for i in range(n)[::-1]:
        for j in adj_vs[i]:
            if j <= i:
                break
            elif not needed[j]:
                needed[i] = True
                break
    print("".join(str(int(x)) for x in needed[::-1]).lstrip("0"))


if __name__ == '__main__':
    main()