Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
  long long int n,W;cin>>n>>W;
  long long int w[n],v[n];
  for(long long int i=0;i<n;i++) cin>>w[i]>>v[i];
  int box[n+1][W+1];
  for(long long int i=0;i<=n;i++){
    for(long long int j=0;j<=W;j++){
      box[i][j]=-1;
    }
  }
  long long int ret=0;
  box[0][0]=0;
  for(long long int i=0;i<n;i++){
    for(long long int j=0;j<=W;j++){
      if(box[i][j]>=0){
        box[i+1][j]=max(box[i][j],box[i+1][j]);
        if(j+w[i]<=W){
          box[i+1][j+w[i]]=max(box[i+1][j+w[i]],box[i][j]+v[i]);
          ret=max(box[i+1][j+w[i]],ret);
        }
      }
    }
  }
  cout<<ret<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:20:31: error: no matching function for call to 'max(int&, long long int)'
   20 |           box[i+1][j+w[i]]=max(box[i+1][j+w[i]],box[i][j]+v[i]);
      |                            ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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:   template argument deduction/substitution failed:
a.cc:20:31: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
   20 |           box[i+1][j+w[i]]=max(box[i+1][j+w[i]],box[i][j]+v[i]);
      |                            ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/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, 2 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:   candidate expects 1 argument, 2 provided
/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:   template argument deduction/substitution failed:
a.cc:20:31: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   20 |           box[i+1][j+w[i]]=max(box[i+1][j+w[i]],box[i][j]+v[i]);
      |                            ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
a.cc:21:18: error: no matching function for call to 'max(int&, long long int&)'
   21 |           ret=max(box[i+1][j+w[i]],ret);
      |               ~~~^~~~~~~~~~~~~~~~~~~~~~
/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:   template argument deduction/substitution failed:
a.cc:21:18: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
   21 |           ret=max(box[i+1][j+w[i]],ret);
      |               ~~~^~~~~~~~~~~~~~~~~~~~~~
/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, 2 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:   candidate expects 1 argument, 2 provided
/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:   template argument deduction/substitution failed:
a.cc:21:18: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   21 |           ret=max(box[i+1][j+w[i]],ret);
      |               ~~~^~~~~~~~~~~~~~~~~~~~~~