e275

/* e275             */
/* AC (0.1s, 116KB) */
#pragma warning( disable : 4996 )
#include <cstdio>
#include <cstring>
#include <cstdint>
#include <cmath>
#include <algorithm>
#include <tuple>
#define ios_jazz ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0)

using namespace std;

using int16 = short;
using uint16 = unsigned short;
using int32 = int;
using uint = unsigned int;
using int64 = long long;
using uint64 = unsigned long long;
using pii = pair<int, int>;

/* main code */

bool isParityZero(uint64 x)
{
    for (int i = 32; i; i >>= 1)
        x = x ^ (x >> i);
    return !(x & 1);
}

constexpr uint MAXN = 100000;
uint n, arr[2];
uint64 x;

int main()
{
    while (~scanf("%u", &n))
    {
        arr[0] = arr[1] = 0;
        for (uint i = 0; i < n; ++i)
        {
            scanf("%llu", &x);
            ++arr[!isParityZero(x)];
        }
        if (n == 1)
            puts("0");
        else
            printf("%llu\n", (uint64)n * (n - 1) / 2 - arr[0] * arr[1]);
    }
    return 0;
}