Language: C++

#include <iostream>
#include <cstring>
#include <cmath> 
#include <algorithm>

using namespace std;

const int maxn=1e3+10,mod=1e9+7;
int n,m,va;
char c;
unsigned long long map[maxn][maxn],f[maxn][maxn];

int main()
{
	//memset(f,1,sizeof(f));
	cin>>n>>m;
	for(int i=1;i<=n;i++)
	{
		for(int j=1;j<=m;j++)
		{
			cin>>c;
			if(c=='#')
			{
				map[i][j]=-1;
			}
		}
	}
	f[1][1]=1;
	for(int i=1;i<=n;i++)
    {
	    for(int j=1;j<=m;j++)
	    {
	    	if(map[i][j]==-1)
			{
				f[i][j]=0;
			} 
			else
			{
				f[i][j]=max(f[i][j],3);
				f[i][j]%=mod;
			}
	    }
    }
//    for(int i=1;i<=n;i++)
//    {
//    	for(int j=1;j<=m;j++)
//    	{
//    		cout<<f[i][j]<<" ";
//		}
//    	cout<<endl;
//	}
	cout<<endl; 
	cout<<f[n][m]%mod<<endl;
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:39:44: error: no matching function for call to 'max(long long unsigned int&, int)'
   39 |                                 f[i][j]=max(f[i][j],3);
      |                                         ~~~^~~~~~~~~~~
In file included from /usr/include/c++/14/string:51,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 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:39:44: note:   deduced conflicting types for parameter 'const _Tp' ('long long unsigned int' and 'int')
   39 |                                 f[i][j]=max(f[i][j],3);
      |                                         ~~~^~~~~~~~~~~
/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,
                 from a.cc:4:
/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:39:44: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long unsigned int'
   39 |                                 f[i][j]=max(f[i][j],3);
      |                                         ~~~^~~~~~~~~~~