'''
import os
os.chdir("C:\Users\jborthen\Desktop\Python\HackerRank")
execfile("python-tuples.py")
'''

#import __builtins__

N=int(raw_input())
int_values=raw_input()
T=()
for i in range(0,N):
	T=T+(int(int_values.split(" ")[i]),)

print hash(T)