1 #include <iostream>
 2 #include <queue>
 3 #include <stack>
 4 #include <cstdio>
 5 #include <vector>
 6 #include <map>
 7 #include <set>
 8 #include <bitset>
 9 #include <algorithm>
10 #include <cmath>
11 #include <cstring>
12 #include <cstdlib>
13 #include <string>
14 #include <sstream>
15 #include <time.h>
16 #define x first
17 #define y second
18 #define pb push_back
19 #define mp make_pair
20 #define lson l,m,rt*2
21 #define rson m+1,r,rt*2+1
22 #define mt(A,B) memset(A,B,sizeof(A))
23 #define mod 1000000007
24 using namespace std;
25 typedef long long LL;
26 const double PI = acos(-1);
27 const int N=2e5+10;
28 const int inf = 0x3f3f3f3f;
29 const LL INF=0x3f3f3f3f3f3f3f3fLL;
30 LL x[100];
31 int vis[100],ans=inf;
32 vector<LL> P,Q;
33 int main()
34 {
35 #ifdef Local
36     freopen("data.txt","r",stdin);
37 #endif
38     LL n,k,sum=0;
39     int flg=0;
40     cin>>n>>k;
41     mt(vis,0);
42     for(int i=0;i<n;i++)cin>>x[i];
43     for(LL i=0;i<34;i++)
44     {
45         if(pow(2,i)>k)break;
46         else
47         {
48 
49             if((LL)(k&(LL)pow(2,i))==0)
50             {
51                 P.pb(i);
52                 //printf("%lld %lld\n",i,pow(2,i));
53             }
54 
55         }
56     }
57     for(int i=0;i<n;i++)
58     {
59         int flag=0;
60         if(x[i]>k)continue;
61         for(int j=0;j<P.size();j++)
62         {
63             if(x[i]&(LL)pow(2,P[j]))
64             {
65                 flag=1;break;
66             }
67         }
68         if(!flag)Q.pb(x[i]);
69     }
70     //for(int i=0;i<Q.size();i++)cout<<Q[i]<<endl;
71     for(int i=0;i<Q.size();i++)
72     {
73         sum|=Q[i];
74         //cout<<sum<<endl;
75         if(sum==k)flg=1;
76     }
77     for(int i=0;i<Q.size();i++)
78     {
79         for(int j=0;j<34;j++)
80         {
81             if(pow(2,j)>k)break;
82             if((LL)pow(2,j)&Q[i])vis[j]++;
83         }
84     }
85     for(int i=0;i<34;i++)
86     {
87         if(vis[i])ans=min(ans,vis[i]);
88     }
89     if(ans==inf||!flg)ans=0;
90     cout<<ans<<endl;
91 #ifdef Local
92     cerr << "time: " << (LL) clock() * 1000 / CLOCKS_PER_SEC << " ms" << endl;
93 #endif
94 }