#include <cstdio>
#define isdigit(ch) ((ch) >= '0' && (ch) <= '9')

namespace IO {
template <typename T>
T read() {
  T res = 0, f = 1;
  char ch = getchar();
  for (; !isdigit(ch); ch = getchar())
    if (ch == '-')
      f = -1;
  for (; isdigit(ch); ch = getchar())
    res = (res << 3) + (res << 1) + (ch ^ 48);
  return res * f;
}

template <typename T>
void write(T x, char ed = '\n') {
  if (x < 0)
    x = -x, putchar('-');
  static int sta[sizeof(T) << 2], top = 0;
  do {
    sta[++top] = x % 10;
    x /= 10;
  } while (x);
  while (top) {
    putchar(sta[top--] ^ 48);
  }
  putchar(ed);
}
} // namespace IO
using namespace IO;

const int MAXN = 1e5 + 10;

int n;
int a[MAXN];
int cover[MAXN];
int ans;

bool ok;
void dfs(int now, int len) {
  if (ok)
    return;
  if (now == len + 1) {
    ans = len;
    ok = true;
    return;
  }
  for (int i = cover[now - 1] + 1; i <= n; ++i) {
    if (a[cover[now - 1]] & a[i]) {
      cover[now] = i;
      dfs(now + 1, len);
      if (ok)
        return;
    }
  }
}

int main() {
  freopen("bzoj_4300.in", "r", stdin);
  freopen("bzoj_4300.out", "w", stdout);
  n = read<int>();
  for (int i = 1; i <= n; ++i) {
    a[i] = read<int>();
  }
  a[0] = 0x7fffffff;

  int l = 1, r = n, ans;
  while (l < r) {
    int mid = l + ((r - l) >> 1);
    ok = false;
    dfs(1, mid);
    if (ok) {
      ans = mid;
      l = mid + 1;
    } else {
      r = mid - 1;
    }
  }

  write(ans);
  return 0;
}