#include <bits/stdc++.h>

#define rep(i, a, b) for(int i = (a); i <= (b); i ++)
using std::cin, std::cout, std::cerr;
using ll = long long;

int main() {
    std::ios::sync_with_stdio(false);
    int n; cin >> n;
    auto p = [](int n) {
        return __builtin_popcount(n);
    };

    int ans = 0;
    rep(i, 0, n) rep(j, i, n) if(p(i) == p(j))
        ans += (i & j);
    cout << ans << '\n';
}