# No.83 最大マッチング
num_matches = [6, 2, 5, 5, 4, 5, 6, 3, 7, 6]
n = int(input())

num = ''

if n % 2 == 0:
    num += '1' * (n // 2)
else:
    num = '7' + '1' * (n // 2 - 1)

print(num)