Language: C++

#include <bits/stdc++.h>
                                #include<iostream>
                                #include<cstdio>
                                #include<vector>
                                #include<queue>
                                #include<map>
                                #include<cstring>
                                #include<string>
                                #include <math.h>
                                #include<algorithm>
                            //    #include <boost/multiprecision/cpp_int.hpp>
                                #include<functional>
                       #define int long long
                                #define inf  10000000000007
                                #define pa pair<int,int>
                                #define ll long long
                                #define pal pair<double,pa>
                                #define ppa pair<pa,int>
                                #define ppap pair<int,pa>
                                #define ssa pair<string,int>
                                #define  mp make_pair
                                #define  pb push_back
                                #define EPS (1e-10)
                                #define equals(a,b) (fabs((a)-(b))<EPS)
                          
                                using namespace std;
                       
                                class Point{
                                    public:
                                    double x,y;
                                    Point(double x=0,double y=0):x(x),y(y) {}
                                    Point operator + (Point p) {return Point(x+p.x,y+p.y);}
                                    Point operator - (Point p) {return Point(x-p.x,y-p.y);}
                                    Point operator * (double a) {return Point(x*a,y*a);}
                                    Point operator / (double a) {return Point(x/a,y/a);}
                                    double absv() {return sqrt(norm());}
                                    double norm() {return x*x+y*y;}
                                    bool operator < (const Point &p) const{
                                        return x != p.x ? x<p.x: y<p.y;
                                    }
                                    bool operator == (const Point &p) const{
                                        return fabs(x-p.x)<EPS && fabs(y-p.y)<EPS;
                                    }
                                };
                                typedef Point Vector;
                          
                                struct Segment{
                                Point p1,p2;
                                };
                                 double dot(Vector a,Vector b){
                                    return a.x*b.x+a.y*b.y;
                                }
                                double cross(Vector a,Vector b){
                                    return a.x*b.y-a.y*b.x;
                                }
                             
    bool parareru(Point a,Point b,Point c,Point d){
    //  if(abs(cross(a-b,d-c))<EPS)cout<<"dd "<<cross(a-b,d-c)<<endl;
        return abs(cross(a-b,d-c))<EPS;
    }
    double distance_ls_p(Point a, Point b, Point c) {
      if ( dot(b-a, c-a) < EPS ) return (c-a).absv();
      if ( dot(a-b, c-b) < EPS ) return (c-b).absv();
      return abs(cross(b-a, c-a)) / (b-a).absv();
    }
    bool is_intersected_ls(Segment a,Segment b) {
        if(a.p1==b.p1||a.p2==b.p1||a.p1==b.p2||a.p2==b.p2) return false;
        if(parareru((a.p2),(a.p1),(a.p1),(b.p2))&&parareru((a.p2),(a.p1),(a.p1),(b.p1))){
    //      cout<<"sss"<<endl;
            if(dot(a.p1-b.p1,a.p1-b.p2)<EPS) return true;
            if(dot(a.p2-b.p1,a.p2-b.p2)<EPS) return true;
            if(dot(a.p1-b.p1,a.p2-b.p1)<EPS) return true;
            if(dot(a.p1-b.p2,a.p2-b.p2)<EPS) return true;
            return false;
        }
      else return ( cross(a.p2-a.p1, b.p1-a.p1) * cross(a.p2-a.p1, b.p2-a.p1) < EPS ) && ( cross(b.p2-b.p1, a.p1-b.p1) * cross(b.p2-b.p1, a.p2-b.p1) < EPS );
    }
      
    double segment_dis(Segment a,Segment b){
        if(is_intersected_ls(a,b))return 0;
        double r=distance_ls_p(a.p1, a.p2, b.p1);
        r=min(r,distance_ls_p(a.p1, a.p2, b.p2));
        r=min(r,distance_ls_p(b.p1, b.p2, a.p2));
        r=min(r,distance_ls_p(b.p1, b.p2, a.p1));
        return r;
    }
    Point intersection_ls(Segment a, Segment b) {
      Point ba = b.p2-b.p1;
      double d1 = abs(cross(ba, a.p1-b.p1));
      double d2 = abs(cross(ba, a.p2-b.p1));
      double t = d1 / (d1 + d2);
      
      return a.p1 + (a.p2-a.p1) * t;
    }
      
                    string itos( int i ) {
                    ostringstream s ;
                    s << i ;
                    return s.str() ;
                    }
                      
                    int gcd(int v,int b){
                        if(v>b) return gcd(b,v);
                        if(v==b) return b;
                        if(b%v==0) return v;
                        return gcd(v,b%v);
                    }
      
                    double distans(double x1,double y1,double x2,double y2){
                        double rr=(x1-x2)*(x1-x2)+(y1-y2)*(y1-y2);
                        return sqrt(rr);
                         
                    }
                    /*
    int pr[100010];
    //int inv[100010];
    */
    int beki(int wa,int rr,int warukazu){
        if(rr==0) return 1ll;
        if(rr==1) return wa%warukazu;
        if(rr%2==1) return (beki(wa,rr-1,warukazu)*wa)%warukazu;
        int zx=beki(wa,rr/2,warukazu);
        return (zx*zx)%warukazu;
    }
      /*
    void gya(){
        pr[0]=1;
        for(int i=1;i<100010;i++){
            pr[i]=(pr[i-1]*i)%inf;
        }
        for(int i=0;i<100010;i++) inv[i]=beki(pr[i],inf-2);
         
    }
      
    */
     //sort(ve.begin(),ve.end(),greater<int>());
                             //----------------kokomade tenpure------------
    //vector<double> ans(100000000),ans2(100000000);
    /*
    int par[200100],ranks[200100],kosuu[200100];     
      
    void shoki(int n){
        for(int i=0;i<n;i++){
            par[i]=i;
            ranks[i]=0;
            kosuu[i]=1;
        }
    }
      
    int root(int x){
        return par[x]==x ? x : par[x]=root(par[x]);
    }
      
    bool same(int x,int y){
    return root(x)==root(y);
    }
      
    void unite(int x,int y){
     x=root(x);
     y=root(y);
        int xx=kosuu[x],yy=kosuu[y];
     if(x==y) return;
        if(ranks[x]<ranks[y]){
            par[x]=y;
            kosuu[y]=yy+xx;
        }
     else {
        par[y]=x;
        if(ranks[x]==ranks[y]) ranks[x]=ranks[x]+1;
        kosuu[x]=yy+xx;
     }
        return;
    }
    */
 
string s;
int it;
vector<int> ve[5];
vector<int> V;
vector<int> ch[5];
 
vector<int> U(vector<int> a1,vector<int> a2){
    vector<int> ve;
    for(int i=0;i<a1.size();i++)ve.pb(a1[i]|a2[i]);
    return ve;
}
 
vector<int> I(vector<int> a1,vector<int> a2){
    vector<int> ve;
    for(int i=0;i<a1.size();i++)ve.pb(a1[i]&a2[i]);
    return ve;
}
vector<int> S(vector<int> a1,vector<int> a2){
    vector<int> ve;
    for(int i=0;i<a1.size();i++)ve.pb(a1[i]^a2[i]);
    return ve;
}
vector<int> D(vector<int> a1,vector<int> a2){
    vector<int> ve;
     
    for(int i=0;i<a1.size();i++){
        int r;
        if(a1[i]==1 && a2[i]==0) r=1;
        else r=0;
        ve.pb(r);
    }
    return ve;
}
 
vector<int> C(vector<int> a1){
    vector<int> ve;
    for(int i=0;i<a1.size();i++)ve.pb(1-a1[i]);
    return ve;
}
vector<int> shiki();
vector<int> han(){
//  cout<<s[it]<<endl;
    if(s[it]=='c'){
        it++;
        vector<int> e=ka();
        return C(e);
    }
    else{
        it++;
        return ch[s[it-1]-'A'];
    }
}
 
vector<int> ka(){
    if(s[it]=='('){
        it++;
        vector<int> q=shiki();
        it++;
        return q;
    }
    else return han();
     
}
 
 
 
vector<int> shiki(){
    vector<int> r= ka();
    while(s[it]=='u'||s[it]=='s'||s[it]=='d'||s[it]=='i'){
        char c=s[it];
        it++;
        vector<int> r2=ka();
         
        if(c=='u') r=U(r,r2);
        if(c=='s') r=S(r,r2);
        if(c=='d') r=D(r,r2);
        if(c=='i') r=I(r,r2);
    }
    return r;
}
 
int cnt=0;
signed main(){
char c;
    int d;
    while(1){
         
        cnt++;
    //  if(cnt>20) break;
         
        while(1){
            cin>>c>>d;
             
            if(c=='R') break;
            for(int i=0;i<d;i++){
                int r;
                cin>>r;
                ve[c-'A'].pb(r);
            }
             
        }
        set<int> se;
         
        for(int i=0;i<5;i++)for(int j=0;j<ve[i].size();j++)se.insert(ve[i][j]);
        V.clear();
        for(auto its=se.begin();its!=se.end();its++){
            V.pb(*its);
        }
         
        for(int i=0;i<5;i++){
            for(int j=0;j<V.size();j++){
            bool b=false;
            for(int k=0;k<ve[i].size();k++){
                if(ve[i][k]==V[j]) b=true;
            }
            if(b) ch[i].pb(1);
            else ch[i].pb(0);
        }
    //      for(int j=0;j<V.size();j++)cout<<ch[i][j];
    //      cout<<endl;
        }
        it=0;
        cin>>s;
        s+="*";
        vector<int> ans=shiki();
        bool r=false;
        for(int i=0;i<ans.size();i++)if(ans[i]) r=true, cout<<V[i]<<" ";
        if(!r) cout<<"NULL";
        cout<<endl;
         
    }
     
    return 0;
}

Compiler output:
a.cc: In function 'std::vector<long long int> han()':
a.cc:220:23: error: 'ka' was not declared in this scope; did you mean 'pa'?
  220 |         vector<int> e=ka();
      |                       ^~
      |                       pa