Language: C++

include <bits/stdc++.h>
using namespace std;
#define FOR(i,n) for(int i=0;i<n;i++)
#define why(n,x) int n;while(cin >>n,n!=x)
#define iFOR(i,x,n)for(int i=x;i<n;i++)
#define unless(flg) if ( !(flg) )
#define read cin<<
#define echo cout<<
#define fin <<'\n'
#define __ <<" "<<
#define ___ <<" "
#define bash push_back
#define ALL(x) x.begin(),x.end()
#define SWAP(a,b) ((a != b) && (a += b,b = a - b,a -= b))
#define cinf(n,x) for(int UNCH=0;UNCH<(n);UNCH++) cin >> x[UNCH];
#define fcin(n,x) for(int UNCH=1;UNCH<=(n);UNCH++) cin>> x[UNCH];
#define memmin(x) memset((x),-1,sizeof((x)))
#define memzer(x) memset((x), 0,sizeof((x)))
#define meminf(x) memset((x),0x3f,sizeof((x)))
#define int long long
typedef long long ll;
typedef pair < int , int >  pii;
typedef vector < int > vit;
typedef map < string , int > mstit;
typedef vector < pii > vpi ;
typedef greater < pii > gpi;
typedef priority_queue < pii , vpi , gpi > dijk ;
static const signed int INF = 0x3f3f3f3f;
static const signed long long LINF = 0x3f3f3f3f3f3f3f3fLL;
static const signed int SMOD = 1000000007;
static const signed int NMOD = 1000000009;
static const signed int dx[]={1,0,-1,0,1,1,-1,-1};
static const signed int dy[]={0,-1,0,1,-1,1,-1,1};

bool inside(int x,int y,int w,int h){return (x>=0 && y>=0 && x<w && y<h);}
template<class T>T abs(T &x){return x<0 ? -x : x;}
template<class T>bool chmax(T &a, const T &b) { if (a<b) { a=b; return 1; } return 0; }
template<class T>bool chmin(T &a, const T &b) { if (b<a) { a=b; return 1; } return 0; }
int qp(int a,ll b,int mo){int ans=1;do{if(b&1)ans=1ll*ans*a%mo;a=1ll*a*a%mo;}while(b>>=1);return ans;}
int gcd(int a,int b){return b?gcd(b,a%b):a;}



signed main(){
    int n,m;
    int a[10005]={};
    int x,y;
    cin >> n >> m;
    FOR(i,n){
        cin >> x;
        FOR(i,x){
            cin >> y;
            a[y]++;
        }
    }
    int ans = 0;
    FOR(i,m+1){
        if(a[i]==n) ans++;
    }
    cout << ans fin;
  
  return 0;
}



struct xyz{ xyz(){ cin.tie(0), ios::sync_with_stdio(false); cout <<fixed<<setprecision(12);};}xyzzy;




Compiler output:
a.cc:1:1: error: 'include' does not name a type
    1 | include <bits/stdc++.h>
      | ^~~~~~~
a.cc:22:9: error: 'pair' does not name a type
   22 | typedef pair < int , int >  pii;
      |         ^~~~
a.cc:23:9: error: 'vector' does not name a type
   23 | typedef vector < int > vit;
      |         ^~~~~~
a.cc:24:9: error: 'map' does not name a type
   24 | typedef map < string , int > mstit;
      |         ^~~
a.cc:25:9: error: 'vector' does not name a type
   25 | typedef vector < pii > vpi ;
      |         ^~~~~~
a.cc:26:9: error: 'greater' does not name a type
   26 | typedef greater < pii > gpi;
      |         ^~~~~~~
a.cc:27:9: error: 'priority_queue' does not name a type
   27 | typedef priority_queue < pii , vpi , gpi > dijk ;
      |         ^~~~~~~~~~~~~~
a.cc: In function 'int main()':
a.cc:48:5: error: 'cin' was not declared in this scope; did you mean 'fin'?
   48 |     cin >> n >> m;
      |     ^~~
      |     fin
a.cc:60:5: error: 'cout' was not declared in this scope
   60 |     cout << ans fin;
      |     ^~~~
a.cc: In constructor 'xyz::xyz()':
a.cc:67:20: error: 'cin' was not declared in this scope; did you mean 'fin'?
   67 | struct xyz{ xyz(){ cin.tie(0), ios::sync_with_stdio(false); cout <<fixed<<setprecision(12);};}xyzzy;
      |                    ^~~
      |                    fin
a.cc:67:32: error: 'ios' has not been declared
   67 | struct xyz{ xyz(){ cin.tie(0), ios::sync_with_stdio(false); cout <<fixed<<setprecision(12);};}xyzzy;
      |                                ^~~
a.cc:67:61: error: 'cout' was not declared in this scope
   67 | struct xyz{ xyz(){ cin.tie(0), ios::sync_with_stdio(false); cout <<fixed<<setprecision(12);};}xyzzy;
      |                                                             ^~~~
a.cc:67:68: error: 'fixed' was not declared in this scope
   67 | struct xyz{ xyz(){ cin.tie(0), ios::sync_with_stdio(false); cout <<fixed<<setprecision(12);};}xyzzy;
      |                                                                    ^~~~~
a.cc:67:75: error: 'setprecision' was not declared in this scope
   67 | struct xyz{ xyz(){ cin.tie(0), ios::sync_with_stdio(false); cout <<fixed<<setprecision(12);};}xyzzy;
      |                                                                           ^~~~~~~~~~~~