Language: C++

k#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;

int tani[21];
int needs[21];


// iÌóÔ©çUÈãÌPÊÉ½Çè­Å¬C
int dp[1<<20];
// s«æ
//vector<int> tos[1<<20];
int U;
int n;

int dfs(int s,int sum){
	if(dp[s]!=-1)
		return dp[s];
	else if(sum>=U){
		dp[s]=0;
		return dp[s];
	}
	else{
		int minCost=1000000;
		//bool used[21];
		//for(int i = 0; i < n; i++){
		//	if((s>>i)&1)
		//		used[i]=true;
		//}
		// Â¬ÉÇ±ÖJÚ·é©
		//for(int i = 0; i < tos[s].size(); i++){
		//	minCost=min(minCost,dfs(s|(1<<(tos[s][i])),sum+tani[tos[s][i]])+1);
		//	if(minCost==1)
		//		break;
		//}
		for(int i = 0; i < n; i++){
			// Ü¾JÚµÄÈ©Á½ç
			if(!((s>>i)&1)){
				if(((needs[i])&s)==needs[i]){
					minCost=min(minCost,dfs(s|(1<<i),sum+tani[i])+1);
					if(minCost==1)
						break;
				}
				//for(int j = 0; j < vpii[i].second.size(); j++){
				//	if(!used[vpii[i].second[j]]){
				//		f=true;
				//		break;
				//	}
				//}
				//if(!f)
				//	minCost=min(minCost,dfs(s|(1<<i),sum+vpii[i].first)+1);
			}
		}
		dp[s]=minCost;
		return dp[s];
	}
}

int main(){

	int c,k;
	int t;
	int tn;
	while(cin>>n>>U&&!(n==0&&U==0)){
		fill(dp,dp+(1<<20),-1);
		for(int i = 0; i < n; i++){
			cin>>c>>k;
			tn=0;
			for(int j = 0; j < k; j++){
				cin>>t;
				tn|=(1<<t);
			}
			tani[i]=c;
			needs[i]=tn;
		}
		//for(int s = 0; s < (1<<n); s++){
		//	for(int i = 0; i < n; i++){
		//		if(!((s>>i)&1)){
		//			if(((needs[i])&s)==needs[i]){
		//				tos[s].push_back(i);
		//			}
		//		}
		//	}
		//}

		cout<<dfs(0,0)<<endl;
		//for(int i = 0; i < (1<<n); i++)
		//	tos[i].clear();
	}
	return 0;
}

Compiler output:
a.cc:1:2: error: stray '#' in program
    1 | k#include <iostream>
      |  ^
a.cc:1:1: error: 'k' does not name a type
    1 | k#include <iostream>
      | ^
In file included from /usr/include/c++/14/bits/stl_algobase.h:62,
                 from /usr/include/c++/14/vector:62,
                 from a.cc:2:
/usr/include/c++/14/ext/type_traits.h:164:35: error: 'constexpr const bool __gnu_cxx::__is_null_pointer' redeclared as different kind of entity
  164 |   __is_null_pointer(std::nullptr_t)
      |                                   ^
/usr/include/c++/14/ext/type_traits.h:159:5: note: previous declaration 'template<class _Type> constexpr bool __gnu_cxx::__is_null_pointer(_Type)'
  159 |     __is_null_pointer(_Type)
      |     ^~~~~~~~~~~~~~~~~
/usr/include/c++/14/ext/type_traits.h:164:26: error: 'nullptr_t' is not a member of 'std'
  164 |   __is_null_pointer(std::nullptr_t)
      |                          ^~~~~~~~~
In file included from /usr/include/c++/14/bits/stl_pair.h:60,
                 from /usr/include/c++/14/bits/stl_algobase.h:64:
/usr/include/c++/14/type_traits:295:27: error: 'size_t' has not been declared
  295 |   template <typename _Tp, size_t = sizeof(_Tp)>
      |                           ^~~~~~
/usr/include/c++/14/type_traits:666:33: error: 'nullptr_t' is not a member of 'std'
  666 |     struct is_null_pointer<std::nullptr_t>
      |                                 ^~~~~~~~~
/usr/include/c++/14/type_traits:666:42: error: template argument 1 is invalid
  666 |     struct is_null_pointer<std::nullptr_t>
      |                                          ^
/usr/include/c++/14/type_traits:670:48: error: template argument 1 is invalid
  670 |     struct is_null_pointer<const std::nullptr_t>
      |                                                ^
/usr/include/c++/14/type_traits:674:51: error: template argument 1 is invalid
  674 |     struct is_null_pointer<volatile std::nullptr_t>
      |                                                   ^
/usr/include/c++/14/type_traits:678:57: error: template argument 1 is invalid
  678 |     struct is_null_pointer<const volatile std::nullptr_t>
      |                                                         ^
/usr/include/c++/14/type_traits:984:26: error: 'size_t' has not been declared
  984 |   template<typename _Tp, size_t _Size>
      |                          ^~~~~~
/usr/include/c++/14/type_traits:985:40: error: '_Size' was not declared in this scope
  985 |     struct __is_array_known_bounds<_Tp[_Size]>
      |                                        ^~~~~
/usr/include/c++/14/type_traits:985:46: error: template argument 1 is invalid
  985 |     struct __is_array_known_bounds<_Tp[_Size]>
      |                                              ^
/usr/include/c++/14/type_traits:1429:37: error: 'size_t' is not a member of 'std'
 1429 |     : public integral_constant<std::size_t, alignof(_Tp)>
      |                                     ^~~~~~
/usr/include/c++/14/type_traits:1429:57: error: template argument 1 is invalid
 1429 |     : public integral_constant<std::size_t, alignof(_Tp)>
      |                                                         ^
/usr/include/c++/14/type_traits:1429:57: note: invalid template non-type parameter
/usr/include/c++/14/type_traits:1438:37: error: 'size_t' is not a member of 'std'
 1438 |     : public integral_constant<std::size_t, 0> { };
      |                                     ^~~~~~
/usr/include/c++/14/type_traits:1438:46: error: template argument 1 is invalid
 1438 |     : public integral_constant<std::size_t, 0> { };
      |                                              ^
/usr/include/c++/14/type_traits:1438:46: note: invalid template non-type parameter
/usr/include/c++/14/type_traits:1440:26: error: 'std::size_t' has not been declared
 1440 |   template<typename _Tp, std::size_t _Size>
      |                          ^~~
/usr/include/c++/14/type_traits:1441:21: error: '_Size' was not declared in this scope
 1441 |     struct rank<_Tp[_Size]>
      |                     ^~~~~
/usr/include/c++/14/type_traits:1441:27: error: template argument 1 is invalid
 1441 |     struct rank<_Tp[_Size]>
      |                           ^
/usr/include/c++/14/type_traits:1442:37: error: 'size_t' is not a member of 'std'
 1442 |     : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { };
      |                                     ^~~~~~
/usr/include/c++/14/type_traits:1442:65: error: template argument 1 is invalid
 1442 |     : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { };
      |                                                                 ^
/usr/include/c++/14/type_traits:1442:65: note: invalid template non-type parameter
/usr/include/c++/14/type_traits:1446:37: error: 'size_t' is not a member of 'std'
 1446 |     : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { };
      |                                     ^~~~~~
/usr/include/c++/14/type_traits:1446:65: error: template argument 1 is invalid
 1446 |     : public integral_constant<std::size_t, 1 + rank<_Tp>::value> { };
      |                                                                 ^
/usr/include/c++/14/type_traits:1446:65: note: invalid template non-type parameter
/usr/include/c++/14/type_traits:1451:32: error: 'size_t' was not declared in this scope
 1451 |     : public integral_constant<size_t, 0> { };
      |                                ^~~~~~
/usr/include/c++/14/type_traits:64:1: note: 'size_t' is defined in header '<cstddef>'; this is probably fixable by adding '#include <cstddef>'
   63 | #include <bits/version.h>
  +++ |+#include <cstddef>
   64 | 
/usr/include/c++/14/type_traits:1451:41: error: template argument 1 is invalid
 1451 |     : public integral_constant<size_t, 0> { };
      |                                         ^
/usr/include/c++/14/type_traits:1451:41: note: invalid template non-type parameter
/usr/include/c++/14/type_traits:1453:26: error: 'size_t' has not been declared
 1453 |   template<typename _Tp, size_t _Size>
      |                          ^~~~~~
/usr/include/c++/14/type_traits:1454:23: error: '_Size' was not declared in this scope
 1454 |     struct extent<_Tp[_Size], 0>
      |                       ^~~~~
/usr/include/c++/14/type_traits:1454:32: error: template argument 1 is invalid
 1454 |     struct extent<_Tp[_Size], 0>
      |                                ^
/usr/include/c++/14/type_traits:1455:32: error: 'size_t' was not declared in this scope
 1455 |     : public integral_constant<size_t, _Size> { };
      |                                ^~~~~~
/usr/include/c++/14/type_traits:1455:32: note: 'size_t' is defined in header '<cstddef>'; this is probably fixable by adding '#include <cstddef>'
/usr/include/c++/14/type_traits:1455:40: error: '_Size' was not declared in this scope
 1455 |     : public integral_constant<size_t, _Size> { };
      |                                        ^~~~~
/usr/include/c++/14/type_traits:1455:45: error: template argument 1 is invalid
 1455 |     : public integral_constant<size_t, _Size> { };
      |                                             ^
/usr/include/c++/14/type_traits:1455:45: error: template argument 2 is invalid
/usr/include/c++/14/type_traits:1457:42: error: 'size_t' has not been declared
 1457 |   template<typename _Tp, unsigned _Uint, size_t _Size>
      |                                          ^~~~~~
/usr/include/c++/14/type_traits:1458:23: error: '_Size' was not declared in this scope
 1458 |     struct extent<_Tp[_Size], _Uint>
      |                       ^~~~~
/usr/include/c++/14/type_traits:1458:36: error: template argument 1 is invalid
 1458 |     struct extent<_Tp[_Size], _Uint>
      |                                    ^
/usr/include/c++/14/type_traits:1463:32: error: 'size_t' was not declared in this scope
 1463 |     : public integral_constant<size_t, 0> { };
      |                                ^~~~~~
/usr/include/c++/14/type_traits:1463:32: note: 'size_t' is defined in header '<cstddef>'; this is probably fixable by adding '#include <cstddef>'
/usr/include/c++/14/type_traits:1463:41: error: template argument 1 is invalid
 1463 |     : public integral_constant<size_t, 0> { };
      |                                         ^
/usr/include/c++/14/type_traits:1463:41: note: invalid template non-type parameter
/usr/include/c++/14/type_traits:1857:26: error: 'size_t' does not name a type
 1857 |       { static constexpr size_t __size = sizeof(_Tp); };
      |                          ^~~~~~
/usr/include/c++/14/type_traits:1857:26: note: 'size_t' is defined in header '<cstddef>'; this is probably fixable by adding '#include <cstddef>'
/usr/include/c++/14/type_traits:1859:14: error: 'size_t' has not been declared
 1859 |     template<size_t _Sz, typename _Tp, bool = (_Sz <= _Tp::__size)>
      |              ^~~~~~
/usr/include/c++/14/type_traits:1859:48: error: '_Sz' was not declared in this scope
 1859 |     template<size_t _Sz, typename _Tp, bool = (_Sz <= _Tp::__size)>
      |                                                ^~~
/usr/include/c++/14/type_traits:1860:14: error: no default argument for '_Tp'
 1860 |       struct __select;
      |              ^~~~~~~~
/usr/include/c++/14/type_traits:1862:14: error: 'size_t' has not been declared
 1862 |     template<size_t _Sz, typename _Uint, typename... _UInts>
      |              ^~~~~~
/usr/include/c++/14/type_traits:1863:23: error: '_Sz' was not declared in this scope
 1863 |       struct __select<_Sz, _List<_Uint, _UInts...>, true>
      |                       ^~~
/usr/include/c++/14/type_traits:1863:57: error: template argument 1 is invalid
 1863 |       struct __select<_Sz, _List<_Uint, _UInts...>, true>
      |                                                         ^
/usr/include/c++/14/type_traits:1866:14: error: 'size_t' has not been declared
 1866 |     template<size_t _Sz, typename _Uint, typename... _UInts>
      |              ^~~~~~
/usr/include/c++/14/type_traits:1867:23: error: '_Sz' was not declared in this scope
 1867 |       struct __select<_Sz, _List<_Uint, _UInts...>, false>
      |                       ^~~
/usr/include/c++/14/type_traits:1867:58: error: template argument 1 is invalid
 1867 |