mod = 998244353


def main():
    import sys
    input = sys.stdin.readline

    A = []
    k = 1
    i = 1
    limit = 2
    while k < 10:
        if i & 1:
            A.append(1)
        else:
            if i == limit:
                k += 1
                limit = i * 2 + 2
            A.append(k)
        i += 1

    N = int(input())
    print("".join(map(str, A[:N])))


if __name__ == '__main__':
    main()