import sys
from collections import defaultdict

def main():
    input = sys.stdin.read().split()
    n = int(input[0])
    a = list(map(int, input[1:n+1]))
    
    if n < 2:
        print(0)
        return
    
    total_or = 0
    for num in a:
        total_or |= num
    
    freq = defaultdict(int)
    result = 0
    
    for num in a:
        target = num ^ total_or
        result += freq[target]
        freq[num] += 1
    
    print(result)

if __name__ == "__main__":
    main()