def main():
    n = int(input())
    ans = solve(n)
    print(ans)


def solve(n):
    numbers = {0:6, 1:2, 2:5, 3:5, 4:4, 5:5, 6:6, 7:3, 8:7, 9:6}
    tmp = max(0, (n // numbers[1]) - 1)
    ans = '1' * tmp
    n -= tmp * numbers[1]
    ans = ('7' if n == 3 else '1' if n == 2 else '0' )+ ans
    return ans


if __name__ == '__main__':
    main()