n = int(input())
t = n//36
u = [89,12,13,14,15,16,17,18,19,23,24,25,26,27,28,29,34,35,36,37,38,39,45,46,47,48,49,56,57,58,59,67,68,69,78,79][t%36]
u = str(u)
print(u+u[1]*t)