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')
sys.setrecursionlimit(410000000)
stdin = sys.stdin 
ni = lambda: int(ns())
ni_1 = lambda: int(ns())-1
na = lambda: list(map(int, stdin.readline().split()))
ns = lambda: stdin.readline().strip()
nm = lambda: map(int,input().split())
na_1 = lambda: list(map(lambda x:int(x)*(-1), stdin.readline().split()))
na_2 = lambda: list(map(lambda x:int(x)-1, stdin.readline().split()))

N = ni_1()
S = []

	
for a in range(1,10):	
	for b in range(a+1,10):
		if a == b:continue
		S.append(10*a+b)
S.sort()

p = N//len(S)
q = N%len(S)
ans = str(S[q])+str(S[q]%10)*p	

print(ans)