N = int(input())

def naive(n):
    for i in range(10**5,10**7):
        now = str(i) + str(i)[1:][::-1] + "9"
        if(int(now)%N == 0):return now
        now = str(i) + str(i)[::-1] + "9"
        if(int(now)%N == 0):return now

print(naive(N))