Language: C++

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

typedef pair<int, int> P;
typedef long long int ll;

int N;
int GA, GB, SA, SB, BA, BB;
int DP[5000 * 5000 + 2];

int main(){
    cin >> N;
    cin >> GA >> SA >> BA;
    cin >> GB >> SB >> BB;

    DP[0] = 0;
    for(int i=1;i<=N;i++){
        int G = 0, S = 0, B = 0;

        if(GA <= i)    int G = max(i, DP[i-GA] + GB);
        if(SA <= i)    int S = max(i, DP[i-SA] + SB);
        if(BA <= i)    int B = max(i, DP[i-BA] + BB);

        DP[i] = max( max(G, max(S, B)) );
    }

    int D = DP[N];

    for(int i=1;i<=D;i++){
        int G = 0, S = 0, B = 0;

        if(GB <= i)    G = max(i, DP[i-GB] + GA);
        if(SB <= i)    S = max(i, DP[i-SB] + SA);
        if(BB <= i)    B = max(i, DP[i-BB] + BA);

        DP[i] = max( max(G, max(S, B)) );
    }

    cout << DP[D] << endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:24:20: error: no matching function for call to 'max(const int&)'
   24 |         DP[i] = max( max(G, max(S, B)) );
      |                 ~~~^~~~~~~~~~~~~~~~~~~~~
In file included 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_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   candidate expects 2 arguments, 1 provided
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 1 provided
In file included from /usr/include/c++/14/algorithm:61:
/usr/include/c++/14/bits/stl_algo.h:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   template argument deduction/substitution failed:
a.cc:24:20: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   24 |         DP[i] = max( max(G, max(S, B)) );
      |                 ~~~^~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   candidate expects 2 arguments, 1 provided
a.cc:36:20: error: no matching function for call to 'max(const int&)'
   36 |         DP[i] = max( max(G, max(S, B)) );
      |                 ~~~^~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   candidate expects 2 arguments, 1 provided
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note:   candidate expects 3 arguments, 1 provided
/usr/include/c++/14/bits/stl_algo.h:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   template argument deduction/substitution failed:
a.cc:36:20: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   36 |         DP[i] = max( max(G, max(S, B)) );
      |                 ~~~^~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   candidate expects 2 arguments, 1 provided