Language: C++

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef unsigned long long ull;
#define REP(i, n) for(int i=0; i<n; i++)
#define REPi(i, a, b) for(int i=int(a); i<int(b); i++)
#define MEMS(a,b) memset(a,b,sizeof(a))
#define mp make_pair
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; }
const ll MOD = 1e9+7;

int main(){
    ll N, M, Q;
    cin >> N >> M >> Q;
    vector<tuple<ll, ll, ll, ll>> T;
    REP(i,Q){
        ll a, b, c, d;
        cin >> a >> b >> c >> d;
        T.emplace_back(d, a, b, c);
    }

    sort(T.rbegin(), T.rend());

    map<ll, ll> ma;
    ll ans = 0;
    for(auto&& t : T){
        ll a, b, c, d;
        d = get<t>(0);
        a = get<t>(1);
        b = get<t>(2);
        c = get<t>(3);
        if(ma[a] < 2 && ma[b] < 2){
            ma[a]++;
            ma[b]++;
            ans += d;
        }
    }

    cout << ans << endl;
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:31:19: error: no matching function for call to 'get<t>(int)'
   31 |         d = get<t>(0);
      |             ~~~~~~^~~
In file included from /usr/include/c++/14/bits/stl_algobase.h:64,
                 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_pair.h:1250:5: note: candidate: 'template<long unsigned int _Int, class _Tp1, class _Tp2> constexpr typename std::tuple_element<_Int, std::pair<_Tp1, _Tp2> >::type& std::get(pair<_Tp1, _Tp2>&)'
 1250 |     get(pair<_Tp1, _Tp2>& __in) noexcept
      |     ^~~
/usr/include/c++/14/bits/stl_pair.h:1250:5: note:   template argument deduction/substitution failed:
a.cc:31:17: error: could not convert 't' from 'std::tuple<long long int, long long int, long long int, long long int>' to 'long unsigned int'
   31 |         d = get<t>(0);
      |                 ^
      |                 |
      |                 std::tuple<long long int, long long int, long long int, long long int>
/usr/include/c++/14/bits/stl_pair.h:1255:5: note: candidate: 'template<long unsigned int _Int, class _Tp1, class _Tp2> constexpr typename std::tuple_element<_Int, std::pair<_Tp1, _Tp2> >::type&& std::get(pair<_Tp1, _Tp2>&&)'
 1255 |     get(pair<_Tp1, _Tp2>&& __in) noexcept
      |     ^~~
/usr/include/c++/14/bits/stl_pair.h:1255:5: note:   template argument deduction/substitution failed:
a.cc:31:17: error: could not convert 't' from 'std::tuple<long long int, long long int, long long int, long long int>' to 'long unsigned int'
   31 |         d = get<t>(0);
      |                 ^
      |                 |
      |                 std::tuple<long long int, long long int, long long int, long long int>
/usr/include/c++/14/bits/stl_pair.h:1260:5: note: candidate: 'template<long unsigned int _Int, class _Tp1, class _Tp2> constexpr const typename std::tuple_element<_Int, std::pair<_Tp1, _Tp2> >::type& std::get(const pair<_Tp1, _Tp2>&)'
 1260 |     get(const pair<_Tp1, _Tp2>& __in) noexcept
      |     ^~~
/usr/include/c++/14/bits/stl_pair.h:1260:5: note:   template argument deduction/substitution failed:
a.cc:31:17: error: could not convert 't' from 'std::tuple<long long int, long long int, long long int, long long int>' to 'long unsigned int'
   31 |         d = get<t>(0);
      |                 ^
      |                 |
      |                 std::tuple<long long int, long long int, long long int, long long int>
/usr/include/c++/14/bits/stl_pair.h:1265:5: note: candidate: 'template<long unsigned int _Int, class _Tp1, class _Tp2> constexpr const typename std::tuple_element<_Int, std::pair<_Tp1, _Tp2> >::type&& std::get(const pair<_Tp1, _Tp2>&&)'
 1265 |     get(const pair<_Tp1, _Tp2>&& __in) noexcept
      |     ^~~
/usr/include/c++/14/bits/stl_pair.h:1265:5: note:   template argument deduction/substitution failed:
a.cc:31:17: error: could not convert 't' from 'std::tuple<long long int, long long int, long long int, long long int>' to 'long unsigned int'
   31 |         d = get<t>(0);
      |                 ^
      |                 |
      |                 std::tuple<long long int, long long int, long long int, long long int>
In file included from /usr/include/c++/14/bits/memory_resource.h:47,
                 from /usr/include/c++/14/string:68,
                 from /usr/include/c++/14/bitset:52,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:52:
/usr/include/c++/14/tuple:2445:5: note: candidate: 'template<long unsigned int __i, class ... _Elements> constexpr std::__tuple_element_t<__i, std::tuple<_Elements ...> >& std::get(tuple<_Elements ...>&)'
 2445 |     get(tuple<_Elements...>& __t) noexcept
      |     ^~~
/usr/include/c++/14/tuple:2445:5: note:   template argument deduction/substitution failed:
a.cc:31:17: error: could not convert 't' from 'std::tuple<long long int, long long int, long long int, long long int>' to 'long unsigned int'
   31 |         d = get<t>(0);
      |                 ^
      |                 |
      |                 std::tuple<long long int, long long int, long long int, long long int>
/usr/include/c++/14/tuple:2451:5: note: candidate: 'template<long unsigned int __i, class ... _Elements> constexpr std::__tuple_element_t<__i, std::tuple<_Elements ...> >& std::get(const tuple<_Elements ...>&)'
 2451 |     get(const tuple<_Elements...>& __t) noexcept
      |     ^~~
/usr/include/c++/14/tuple:2451:5: note:   template argument deduction/substitution failed:
a.cc:31:17: error: could not convert 't' from 'std::tuple<long long int, long long int, long long int, long long int>' to 'long unsigned int'
   31 |         d = get<t>(0);
      |                 ^
      |                 |
      |                 std::tuple<long long int, long long int, long long int, long long int>
/usr/include/c++/14/tuple:2457:5: note: candidate: 'template<long unsigned int __i, class ... _Elements> constexpr std::__tuple_element_t<__i, std::tuple<_Elements ...> >&& std::get(tuple<_Elements ...>&&)'
 2457 |     get(tuple<_Elements...>&& __t) noexcept
      |     ^~~
/usr/include/c++/14/tuple:2457:5: note:   template argument deduction/substitution failed:
a.cc:31:17: error: could not convert 't' from 'std::tuple<long long int, long long int, long long int, long long int>' to 'long unsigned int'
   31 |         d = get<t>(0);
      |                 ^
      |                 |
      |                 std::tuple<long long int, long long int, long long int, long long int>
/usr/include/c++/14/tuple:2466:5: note: candidate: 'template<long unsigned int __i, class ... _Elements> constexpr std::__tuple_element_t<__i, std::tuple<_Elements ...> >&& std::get(const tuple<_Elements ...>&&)'
 2466 |     get(const tuple<_Elements...>&& __t) noexcept
      |     ^~~
/usr/include/c++/14/tuple:2466:5: note:   template argument deduction/substitution failed:
a.cc:31:17: error: could not convert 't' from 'std::tuple<long long int, long long int, long long int, long long int>' to 'long unsigned int'
   31 |         d = get<t>(0);
      |                 ^
      |                 |
      |                 std::tuple<long long int, long long int, long long int, long long int>
In file included from /usr/include/c++/14/functional:65,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:53:
/usr/include/c++/14/array:390:5: note: candidate: 'template<long unsigned int _Int, class _Tp, long unsigned int _Nm> constexpr _Tp& std::get(array<_Tp, _Nm>&)'
  390 |     get(array<_Tp, _Nm>& __arr) noexcept
      |     ^~~
/usr/include/c++/14/array:390:5: note:   template argument deduction/substitution failed:
a.cc:31:17: error: could not convert 't' from 'std::tuple<long long int, long long int, long long int, long long int>' to 'long unsigned int'
   31 |         d = get<t>(0);
      |                 ^
      |                 |
      |                 std::tuple<long long int, long long int, long long int, long long int>
/usr/include/c++/14/array:399:5: note: candidate: 'template<long unsigned int _Int, class _Tp, long unsigned int _Nm> constexpr _Tp&& std::get(array<_Tp, _Nm>&&)'
  399 |     get(array<_Tp, _Nm>&& __arr) noexcept
      |     ^~~
/usr/include/c++/14/array:399:5: note:   template argument deduction/substitution failed:
a.cc:31:17: error: could not convert 't' from 'std::tuple<long long int, long long int, long long int, long long int>' to 'long unsigned int'
   31 |         d = get<t>(0);
      |                 ^
      |                 |
      |                 std::tuple<long long int, long long int, long long int, long long int>
/usr/include/c++/14/array:408:5: note: candidate: 'template<long unsigned int _Int, class _Tp, long unsigned int _Nm> constexpr const _Tp& std::get(const array<_Tp, _Nm>&)'
  408 |     get(const array<_Tp, _Nm>& __arr) noexcept
      |     ^~~
/usr/include/c++/14/array:408:5: note:   template argument deduction/substitution failed:
a.cc:31:17: error: could not convert 't' from 'std::tuple<long long int, long long int, long long int, long long int>' to 'long unsigned int'
   31 |         d = get<t>(0);
      |                 ^
      |                 |
      |                 std::tuple<long long int, long long int, long long int, long long int>
/usr/include/c++/14/array:417:5: note: candidate: 'template<long unsigned int _Int, class _Tp, long unsigned int _Nm> constexpr const _Tp&& std::get(const array<_Tp, _Nm>&&)'
  417 |     get(const array<_Tp, _Nm>&& __arr) noexcept
      |     ^~~
/usr/include/c++/14/array:417:5: note:   template argument deduction/substitution failed:
a.cc:31:17: error: could not convert 't' from 'std::tuple<long long int, long long int, long long int, long long int>' to 'long unsigned int'
   31 |         d = get<t>(0);
      |                 ^
      |                 |
      |                 std::tuple<long long int, long long int, long long int, long long int>
/usr/include/c++/14/bits/stl_pair.h:1272:5: note: candidate: 'template<class _Tp, class _Up> constexpr _Tp& std::get(pair<_T1, _T2>&)'
 1272 |     get(pair<_Tp, _Up>& __p) noexcept
      |     ^~~
/usr/include/c++/14/bits/stl_pair.h:1272:5: note:   template argument deduction/substitution failed:
a.cc:31:19: error: type/value mismatch at argument 1 in template parameter list for 'template<class _Tp, class _Up> constexpr _Tp& std::get(pair<_T1, _T2>&)'
   31 |         d = get<t>(0);
      |             ~~~~~~^~~
a.cc:31:19: note:   expected a type, got 't'
/usr/include/c++/14/bits/stl_pair.h:1277:5: note: candidate: 'template<class _Tp, class _Up> constexpr const _Tp& std::get(const pair<_T1, _T2>&)'
 1277 |     get(const pair<_Tp, _Up>& __p) noexcept
      |     ^~~
/usr/include/c++/14/bits/stl_pair.h:1277:5: note:   template argument deduction/substitution failed:
a.cc:31:19: error: type/value mismatch at argument 1 in template parameter list for 'template<class _Tp, class _Up> constexpr const _Tp& std::get(const pair<_T1, _T2>&)'
   31 |         d = get<t>(0);
      |             ~~~~~~^~~
a.cc:31:19: note:   expected a type, got 't'
/usr/include/c++/14/bits/stl_pair.h:1282:5: note: candidate: 'template<class _Tp, class