Language: C++

#include <bits/stdc++.h>
using namespace std;

typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<string> vs;
typedef vector<bool> vb;
typedef vector<vb> vvb;
typedef pair<int, int> pii;
typedef long long ll;
typedef unsigned long long ull;

#define all(a)  (a).begin(),(a).end()
#define rall(a) (a).rbegin(), (a).rend()
#define pb push_back
#define mp make_pair
#define loop(i,a,b) for(ull i=(a);i<ull(b);++i)
#define rep(i,n) loop(i,0,n)
#define iter(i,c) for(auto i=(c).begin(); i!=(c).end(); ++i)
#define riter(i,c) for(auto i=(c).rbegin(); i!=(c).rend(); ++i)

const double eps = 1e-10;
const double pi  = acos(-1.0);
const double inf = (int)1e8;

#define clr(a,i) memset((a), (i) ,sizeof(a))

// // 和集合の計算
// template<class T> set<T> Union(set<T>& rsettA, set<T>&rsettB) {
//     set<T> settUnion(rsettA);
//     for (set<T>::iterator itt = rsettB.begin(); itt != rsettB.end(); itt++) {
//         settUnion.insert(*itt);
//     }
//     return settUnion;
// }
// // 積集合の計算
// template<class T> set<T> Product(set<T>& rsettA, set<T>&rsettB) {
//     set<T> settProduct;
//     for (set<T>::iterator itt = rsettB.begin(); itt != rsettB.end(); itt++) {
//         if (rsettA.find(*itt) != rsettA.end()) {
//             settProduct.insert(*itt);
//         }
//     }
//     return settProduct;
// }
// // 補集合の計算
// template<class T> set<T> Complement(set<T>& rsettA, set<T>&rsettB) {
//     set<T> settComplement(rsettA);
//     for (set<T>::iterator itt = rsettB.begin(); itt != rsettB.end(); itt++) {
//         settComplement.erase(*itt);
//     }
//     return settComplement;
// }


int main(){
  int n,m,k,l,t;
  std::cin >> n >> m;
  vvi a;
  vector<int> aa;
  vi h;
  vi uni, inter;
  rep(i,n){
    std::cin >> k;
    rep(j,k){
      cin >> l;
      aa.emplace_back(l);
    }
    sort(all(aa));
    if(a.size()==0){
      a.emplace_back(aa);
    }else{
      rep(j,a.size()){
        set_intersection(all(a[j]), all(aa), back_inserter(inter));
        if(inter.size()!=0){
          set_union(all(a[j]), all(aa), back_inserter(uni));
          a[j]=uni;
          h.emplace_back(j);
        }
        inter.clear();
        uni.clear();
      }

      if(h.size()==0){
        a.emplace_back(aa);
      }else loop(j,1,h.size()){
        set_union(all(a[h[0]]), all(a[h[j]]-j+1), back_inserter(uni));
        a[h[0]]=uni;
        a.erase(a.begin()+h[j]-j+1);
        uni.clear();
      }
    }
    h.clear();
    aa.clear();
  }
  if(a.size()>1) std::cout << "NO" << std::endl;
  else std::cout << "YES" << std::endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:87:44: error: no match for 'operator-' (operand types are '__gnu_cxx::__alloc_traits<std::allocator<std::vector<int> >, std::vector<int> >::value_type' {aka 'std::vector<int>'} and 'ull' {aka 'long long unsigned int'})
   87 |         set_union(all(a[h[0]]), all(a[h[j]]-j+1), back_inserter(uni));
a.cc:13:18: note: in definition of macro 'all'
   13 | #define all(a)  (a).begin(),(a).end()
      |                  ^
In file included from /usr/include/c++/14/bits/stl_algobase.h:67,
                 from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_iterator.h:618:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr decltype ((__y.base() - __x.base())) std::operator-(const reverse_iterator<_Iterator>&, const reverse_iterator<_IteratorR>&)'
  618 |     operator-(const reverse_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:618:5: note:   template argument deduction/substitution failed:
a.cc:87:45: note:   '__gnu_cxx::__alloc_traits<std::allocator<std::vector<int> >, std::vector<int> >::value_type' {aka 'std::vector<int>'} is not derived from 'const std::reverse_iterator<_Iterator>'
   87 |         set_union(all(a[h[0]]), all(a[h[j]]-j+1), back_inserter(uni));
      |                                             ^
a.cc:13:18: note: in definition of macro 'all'
   13 | #define all(a)  (a).begin(),(a).end()
      |                  ^
/usr/include/c++/14/bits/stl_iterator.h:1790:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr decltype ((__x.base() - __y.base())) std::operator-(const move_iterator<_IteratorL>&, const move_iterator<_IteratorR>&)'
 1790 |     operator-(const move_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1790:5: note:   template argument deduction/substitution failed:
a.cc:87:45: note:   '__gnu_cxx::__alloc_traits<std::allocator<std::vector<int> >, std::vector<int> >::value_type' {aka 'std::vector<int>'} is not derived from 'const std::move_iterator<_IteratorL>'
   87 |         set_union(all(a[h[0]]), all(a[h[j]]-j+1), back_inserter(uni));
      |                                             ^
a.cc:13:18: note: in definition of macro 'all'
   13 | #define all(a)  (a).begin(),(a).end()
      |                  ^
In file included from /usr/include/c++/14/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:127:
/usr/include/c++/14/complex:370:5: note: candidate: 'template<class _Tp> std::complex<_Tp> std::operator-(const complex<_Tp>&, const complex<_Tp>&)'
  370 |     operator-(const complex<_Tp>& __x, const complex<_Tp>& __y)
      |     ^~~~~~~~
/usr/include/c++/14/complex:370:5: note:   template argument deduction/substitution failed:
a.cc:87:45: note:   '__gnu_cxx::__alloc_traits<std::allocator<std::vector<int> >, std::vector<int> >::value_type' {aka 'std::vector<int>'} is not derived from 'const std::complex<_Tp>'
   87 |         set_union(all(a[h[0]]), all(a[h[j]]-j+1), back_inserter(uni));
      |                                             ^
a.cc:13:18: note: in definition of macro 'all'
   13 | #define all(a)  (a).begin(),(a).end()
      |                  ^
/usr/include/c++/14/complex:379:5: note: candidate: 'template<class _Tp> std::complex<_Tp> std::operator-(const complex<_Tp>&, const _Tp&)'
  379 |     operator-(const complex<_Tp>& __x, const _Tp& __y)
      |     ^~~~~~~~
/usr/include/c++/14/complex:379:5: note:   template argument deduction/substitution failed:
a.cc:87:45: note:   '__gnu_cxx::__alloc_traits<std::allocator<std::vector<int> >, std::vector<int> >::value_type' {aka 'std::vector<int>'} is not derived from 'const std::complex<_Tp>'
   87 |         set_union(all(a[h[0]]), all(a[h[j]]-j+1), back_inserter(uni));
      |                                             ^
a.cc:13:18: note: in definition of macro 'all'
   13 | #define all(a)  (a).begin(),(a).end()
      |                  ^
/usr/include/c++/14/complex:388:5: note: candidate: 'template<class _Tp> std::complex<_Tp> std::operator-(const _Tp&, const complex<_Tp>&)'
  388 |     operator-(const _Tp& __x, const complex<_Tp>& __y)
      |     ^~~~~~~~
/usr/include/c++/14/complex:388:5: note:   template argument deduction/substitution failed:
a.cc:87:45: note:   mismatched types 'const std::complex<_Tp>' and 'ull' {aka 'long long unsigned int'}
   87 |         set_union(all(a[h[0]]), all(a[h[j]]-j+1), back_inserter(uni));
      |                                             ^
a.cc:13:18: note: in definition of macro 'all'
   13 | #define all(a)  (a).begin(),(a).end()
      |                  ^
/usr/include/c++/14/complex:465:5: note: candidate: 'template<class _Tp> std::complex<_Tp> std::operator-(const complex<_Tp>&)'
  465 |     operator-(const complex<_Tp>& __x)
      |     ^~~~~~~~
/usr/include/c++/14/complex:465:5: note:   candidate expects 1 argument, 2 provided
In file included from /usr/include/c++/14/valarray:605,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:166:
/usr/include/c++/14/bits/valarray_after.h:406:5: note: candidate: 'template<class _Dom1, class _Dom2> std::_Expr<std::__detail::_BinClos<std::__minus, std::_Expr, std::_Expr, _Dom1, _Dom2>, typename std::__fun<std::__minus, typename _Dom1::value_type>::result_type> std::operator-(const _Expr<_Dom1, typename _Dom1::value_type>&, const _Expr<_Dom2, typename _Dom2::value_type>&)'
  406 |     _DEFINE_EXPR_BINARY_OPERATOR(-, struct std::__minus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:406:5: note:   template argument deduction/substitution failed:
a.cc:87:45: note:   '__gnu_cxx::__alloc_traits<std::allocator<std::vector<int> >, std::vector<int> >::value_type' {aka 'std::vector<int>'} is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
   87 |         set_union(all(a[h[0]]), all(a[h[j]]-j+1), back_inserter(uni));
      |                                             ^
a.cc:13:18: note: in definition of macro 'all'
   13 | #define all(a)  (a).begin(),(a).end()
      |                  ^
/usr/include/c++/14/bits/valarray_after.h:406:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__minus, std::_Expr, std::_Constant, _Dom, typename _Dom::value_type>, typename std::__fun<std::__minus, typename _Dom1::value_type>::result_type> std::operator-(const _Expr<_Dom1, typename _Dom1::value_type>&, const typename _Dom::value_type&)'
  406 |     _DEFINE_EXPR_BINARY_OPERATOR(-, struct std::__minus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:406:5: note:   template argument deduction/substitution failed:
a.cc:87:45: note:   '__gnu_cxx::__alloc_traits<std::allocator<std::vector<int> >, std::vector<int> >::value_type' {aka 'std::vector<int>'} is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
   87 |         set_union(all(a[h[0]]), all(a[h[j]]-j+1), back_inserter(uni));
      |                                             ^
a.cc:13:18: note: in definition of macro 'all'
   13 | #define all(a)  (a).begin(),(a).end()
      |                  ^
/usr/include/c++/14/bits/valarray_after.h:406:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__minus, std::_Constant, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__minus, typename _Dom1::value_type>::result_type> std::operator-(const typename _Dom::value_type&, const _Expr<_Dom1, typename _Dom1::value_type>&)'
  406 |     _DEFINE_EXPR_BINARY_OPERATOR(-, struct std::__minus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:406:5: note:   template argument deduction/substitution failed:
a.cc:87:45: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'ull' {aka 'long long unsigned int'}
   87 |         set_union(all(a[h[0]]), all(a[h[j]]-j+1), back_inserter(uni));
      |                                             ^
a.cc:13:18: note: in definition of macro 'all'
   13 | #define all(a)  (a).begin(),(a).end()
      |                  ^
/usr/include/c++/14/bits/valarray_after.h:406:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__minus, std::_Expr, std::_ValArray, _Dom, typename _Dom::value_type>, typename std::__fun<std::__minus, typename _Dom1::value_type>::result_type> std::operator-(const _Expr<_Dom1, typename _Dom1::value_type>&, const valarray<typename _Dom::value_type>&)'
  406 |     _DEFINE_EXPR_BINARY_OPERATOR(-, struct std::__minus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:406:5: note:   template argument deduction/substitution failed:
a.cc:87:45: note:   '__gnu_cxx::__alloc_traits<std::allocator<std::vector<int> >, std::vector<int> >::value_type' {aka 'std::vector<int>'} is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
   87 |         set_union(all(a[h[0]]), all(a[h[j]]-j+1), back_inserter(uni));
      |                                             ^
a.cc:13:18: note: in definition of macro 'all'
   13 | #define all(a)  (a).begin(),(a).end()
      |                  ^
/usr/include/c++/14/bits/valarray_after.h:406:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__minus, std::_ValArray, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__minus, typename _Dom1::value_type>::result_type> std::operator-(const valarray<typename _Dom::value_type>&, const _Expr<_Dom1, typename _Dom1::value_type>&)'
  406 |     _DEFINE_EXPR_BINARY_OPERATOR(-, struct std::__minus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:406:5: note:   template argument deduction/substitution failed:
a.cc:87:45: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'ull' {aka 'long long unsigned int'}
   87 |         set_union(all(a[h[0]]), all(a[h[j]]-j+1), back_inserter(uni));
      |                                             ^
a.cc:13:18: note: in definition of macro