import sys
if sys.platform =='ios':
	import clipboard
	a=clipboard.get()
	a = a.split('\n')
	text = '\n'.join(a)
	with open('input_file.txt','w') as f:
		f.write(text)
	sys.stdin = open('input_file.txt')
	
n = int(input())
if n == 3:
	print(7)
	exit()
	
ans = []
for i in range(n//2):
	ans.append(1)

print(*ans,sep="")