import math N = int(input()) num = 1 if N % 2 == 0: while N > 2: num = 10 * num + 1 N = N / 2 print(num) else: N = N - 1 while N > 2: num = 10 * num + 1 N = N / 2 num_size = int (math.log10(num)) num = num + 6 * (10**num_size) print(num)