import sys

stdin = sys.stdin

mod = 1000000007

ni = lambda: int(ns())
na = lambda: list(map(int, stdin.readline().split()))
ns = lambda: stdin.readline().rstrip()
nas = lambda: stdin.readline().split()

n = ni()
a = na()

ans = 0
for i in range(61):
	z, o = [0] * 2
	for j in range(n):
		if a[j] & (1 << i):
			o += 1
		else:
			z += 1
	ans += z * o * (2 ** i)

print(ans)