# -*- coding: utf-8 -*-
#https://atcoder.jp/contests/abc141/tasks/abc147_d
import sys
#import collections

n= int(input())

tmp = input().split()
s = list(map(lambda a: int(a), tmp))

total=0
a=[]
b=[]
c=[]
for i in range(0,60):
	a.append(0)
	b.append(0)
	c.append(0)

tmp = s[0]
for j in range(0,60):
	if(tmp==0):
		break
	if(tmp%2==1):
		a[j]+=1
	tmp=tmp//2

tmp = s[n-1]
for j in range(0,60):
	if(tmp==0):
		break
	if(tmp%2==1):
		c[j]+=1
	tmp=tmp//2

for i in range(1,n-1):
	tmp = s[i]
	for j in range(0,60):
		if(tmp==0):
			break
		if(tmp%2==1):
			b[j]+=1
		tmp=tmp//2

#print(s)
#print(a)
#print(b)
#print(c)

total=0
for j in range(60,0,-1):
	total*=2
	total=total+(a[j-1]+b[j-1]+c[j-1])*(n-a[j-1]-b[j-1]-c[j-1])
#	print(total)
print(total)



