#a = [
#	[0,3,0,3,3],
#	[7,3,3,5,5],
#	[4,2,7,1,2],
#	[5,3,8,2,2],
#	[5,3,1,5,3]
#]
#b = [1290,4140,3520,4510,3320]



# 990 + 100 * いくつか
n = int(input())
a = [7,78,1110,2910,222]
print(a[n-1])