Language: C++

#include<bits/stdc++.h>
#define REP(i,n)for(int i=0;i<n;i++)
#define FORD(i,a,b) for(int i=a;i>=(b);i--)
#define MP make_pair
#define F first
#define S second
using namespace std;
int main(){
//入力の高速化用のコード
    ll n,k,s,t;cin >> n >> k >> s >> t;
    vector<ll> b(n);REP(i,n)cin >> b[i];
    vector<ll> a;
    REP(i,n){
        bool f=true;
        REP(j,18){
            if((s>>j)&1 and !((b[i]>>j)&1)){
                f=false;break;
            }
            if(!((t>>j)&1) and (b[i]>>j)&1){
                f=false;break;
            }
        }
        if(f)a.PB(b[i]);
    }
    n=SIZE(a);
    k=min(n,k);
    vector<map<pair<ll,ll>,ll>> dp(k);
    REP(i,n){
        FORD(j,k-2,0){
            for(auto l=dp[j].begin();l!=dp[j].end();l++){
                dp[j+1][MP((l->F.F)&a[i],(l->F.S)|a[i])]+=(l->S);
            }
        }
        dp[0][MP(a[i],a[i])]=1;
    }
    ll ans=0;
    REP(i,k)ans+=(dp[i][MP(s,t)]);
    cout << ans << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:5: error: 'll' was not declared in this scope
   10 |     ll n,k,s,t;cin >> n >> k >> s >> t;
      |     ^~
a.cc:10:23: error: 'n' was not declared in this scope; did you mean 'yn'?
   10 |     ll n,k,s,t;cin >> n >> k >> s >> t;
      |                       ^
      |                       yn
a.cc:10:28: error: 'k' was not declared in this scope
   10 |     ll n,k,s,t;cin >> n >> k >> s >> t;
      |                            ^
a.cc:10:33: error: 's' was not declared in this scope
   10 |     ll n,k,s,t;cin >> n >> k >> s >> t;
      |                                 ^
a.cc:10:38: error: 't' was not declared in this scope; did you mean 'tm'?
   10 |     ll n,k,s,t;cin >> n >> k >> s >> t;
      |                                      ^
      |                                      tm
a.cc:11:14: error: template argument 2 is invalid
   11 |     vector<ll> b(n);REP(i,n)cin >> b[i];
      |              ^
a.cc:11:37: error: invalid types 'int[int]' for array subscript
   11 |     vector<ll> b(n);REP(i,n)cin >> b[i];
      |                                     ^
a.cc:12:14: error: template argument 2 is invalid
   12 |     vector<ll> a;
      |              ^
a.cc:16:33: error: invalid types 'int[int]' for array subscript
   16 |             if((s>>j)&1 and !((b[i]>>j)&1)){
      |                                 ^
a.cc:19:34: error: invalid types 'int[int]' for array subscript
   19 |             if(!((t>>j)&1) and (b[i]>>j)&1){
      |                                  ^
a.cc:23:16: error: request for member 'PB' in 'a', which is of non-class type 'int'
   23 |         if(f)a.PB(b[i]);
      |                ^~
a.cc:23:20: error: invalid types 'int[int]' for array subscript
   23 |         if(f)a.PB(b[i]);
      |                    ^
a.cc:25:7: error: 'SIZE' was not declared in this scope
   25 |     n=SIZE(a);
      |       ^~~~
a.cc:27:28: error: template argument 1 is invalid
   27 |     vector<map<pair<ll,ll>,ll>> dp(k);
      |                            ^~
a.cc:27:28: error: template argument 3 is invalid
a.cc:27:28: error: template argument 4 is invalid
a.cc:27:30: error: template argument 1 is invalid
   27 |     vector<map<pair<ll,ll>,ll>> dp(k);
      |                              ^~
a.cc:27:30: error: template argument 2 is invalid
a.cc:30:26: error: invalid types 'int[int]' for array subscript
   30 |             for(auto l=dp[j].begin();l!=dp[j].end();l++){
      |                          ^
a.cc:30:43: error: invalid types 'int[int]' for array subscript
   30 |             for(auto l=dp[j].begin();l!=dp[j].end();l++){
      |                                           ^
a.cc:31:19: error: invalid types 'int[int]' for array subscript
   31 |                 dp[j+1][MP((l->F.F)&a[i],(l->F.S)|a[i])]+=(l->S);
      |                   ^
a.cc:31:38: error: invalid types 'int[int]' for array subscript
   31 |                 dp[j+1][MP((l->F.F)&a[i],(l->F.S)|a[i])]+=(l->S);
      |                                      ^
a.cc:31:52: error: invalid types 'int[int]' for array subscript
   31 |                 dp[j+1][MP((l->F.F)&a[i],(l->F.S)|a[i])]+=(l->S);
      |                                                    ^
a.cc:34:11: error: invalid types 'int[int]' for array subscript
   34 |         dp[0][MP(a[i],a[i])]=1;
      |           ^
a.cc:34:19: error: invalid types 'int[int]' for array subscript
   34 |         dp[0][MP(a[i],a[i])]=1;
      |                   ^
a.cc:34:24: error: invalid types 'int[int]' for array subscript
   34 |         dp[0][MP(a[i],a[i])]=1;
      |                        ^
a.cc:36:7: error: expected ';' before 'ans'
   36 |     ll ans=0;
      |       ^~~~
      |       ;
a.cc:37:13: error: 'ans' was not declared in this scope; did you mean 'abs'?
   37 |     REP(i,k)ans+=(dp[i][MP(s,t)]);
      |             ^~~
      |             abs
a.cc:37:21: error: invalid types 'int[int]' for array subscript
   37 |     REP(i,k)ans+=(dp[i][MP(s,t)]);
      |                     ^
a.cc:38:13: error: 'ans' was not declared in this scope; did you mean 'abs'?
   38 |     cout << ans << endl;
      |             ^~~
      |             abs