Language: C++

#include<bits/stdc++.h>
using namespace std;
int main(){
  int R,C,K;
  cin>>R>>C>>K;
  unsigned long int f[3000][3000]={0};
  unsigned long int dp[3000][3000][4]={0};
  
  for(int i=0;i<K;i++){
    long long int r,c,v;
    cin>>r>>c>>v;
    r--;c--;
    f[c][r]=v;
  }
  dp[0][0][1]=f[0][0];
  for(int i=0;i<R;i++){
    for(int j=0;j<C;j++){
      for(int k=0;k<4;k++){
        if(j-1>=0 && k-1>=0){
          dp[j][i][k]=max(max(dp[j-1][i][k-1]+f[j][i],dp[j][i][k]),dp[j-1][i][k]);
        }
        if(i-1>=0){
          if(k==0){
            long long int m=0;
            for(int l=0;l<4;l++)m=max(m,dp[j][i-1][l]);
            dp[j][i][k]=max(m,dp[j][i][k]);
          }
          else if(k==1){
            dp[j][i][k]=max(dp[j][i][k-1]+f[j][i],dp[j][i][k]);
          }
        }
      }
    }
  }
  long long int m=0;
  for(int i=0;i<4;i++)m=max(dp[C-1][R-1][i],m);
  cout<<m<<endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:25:38: error: no matching function for call to 'max(long long int&, long unsigned int&)'
   25 |             for(int l=0;l<4;l++)m=max(m,dp[j][i-1][l]);
      |                                   ~~~^~~~~~~~~~~~~~~~~
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:25:38: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'long unsigned int')
   25 |             for(int l=0;l<4;l++)m=max(m,dp[j][i-1][l]);
      |                                   ~~~^~~~~~~~~~~~~~~~~
/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:25:38: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   25 |             for(int l=0;l<4;l++)m=max(m,dp[j][i-1][l]);
      |                                   ~~~^~~~~~~~~~~~~~~~~
a.cc:26:28: error: no matching function for call to 'max(long long int&, long unsigned int&)'
   26 |             dp[j][i][k]=max(m,dp[j][i][k]);
      |                         ~~~^~~~~~~~~~~~~~~
/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:26:28: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'long unsigned int')
   26 |             dp[j][i][k]=max(m,dp[j][i][k]);
      |                         ~~~^~~~~~~~~~~~~~~
/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:26:28: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   26 |             dp[j][i][k]=max(m,dp[j][i][k]);
      |                         ~~~^~~~~~~~~~~~~~~
a.cc:36:28: error: no matching function for call to 'max(long unsigned int&, long long int&)'
   36 |   for(int i=0;i<4;i++)m=max(dp[C-1][R-1][i],m);
      |                         ~~~^~~~~~~~~~~~~~~~~~~
/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:36:28: note:   deduced conflicting types for parameter 'const _Tp' ('long unsigned int' and 'long long int')
   36 |   for(int i=0;i<4;i++)m=max(dp[C-1][R-1][i],m);
      |                         ~~~^~~~~~~~~~~~~~~~~~~
/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:36:28: note:   mismatched types 'std::initializer_list<_Tp>' and 'long unsigned int'
   36 |   for(int i=0;i<4;i++)m=max(dp[C-1][R-1][i],m);
      |                         ~~~^~~~~~~~~~~~~~~~~~~