Language: C++

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

int main(){
    constexpr uint_fast32_t mod = 1000000007;

    uint_fast32_t H, W;
    scanf("%d%d", &H, &W);
    vector<vector<int_fast32_t>> ans(H + 1, vector<int_fast32_t>(W + 1));

    {
        string S;
        for(auto i = 0; i < H; ++i){
            cin >> S;
            for(auto j = 0; j < W; ++j){
                if(S[j] & 1)ans[i + 1][j + 1] = -1;
            }
        }
    }

    ans[1][1] = 1;

    for(auto i = 1; i <= H; ++i)
        for(auto j = 1; j <= W; ++j)
            if((i + j ^ 2) && !ans[i][j])
                ans[i][j] = (max(0, ans[i - 1][j]) + max(0, ans[i][j - 1])) % mod;

    printf("%d\n", ans[H][W]);
    
    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:26:33: error: no matching function for call to 'max(int, __gnu_cxx::__alloc_traits<std::allocator<long int>, long int>::value_type&)'
   26 |                 ans[i][j] = (max(0, ans[i - 1][j]) + max(0, ans[i][j - 1])) % mod;
      |                              ~~~^~~~~~~~~~~~~~~~~~
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:26:33: note:   deduced conflicting types for parameter 'const _Tp' ('int' and '__gnu_cxx::__alloc_traits<std::allocator<long int>, long int>::value_type' {aka 'long int'})
   26 |                 ans[i][j] = (max(0, ans[i - 1][j]) + max(0, ans[i][j - 1])) % mod;
      |                              ~~~^~~~~~~~~~~~~~~~~~
/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:26:33: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   26 |                 ans[i][j] = (max(0, ans[i - 1][j]) + max(0, ans[i][j - 1])) % mod;
      |                              ~~~^~~~~~~~~~~~~~~~~~
a.cc:26:57: error: no matching function for call to 'max(int, __gnu_cxx::__alloc_traits<std::allocator<long int>, long int>::value_type&)'
   26 |                 ans[i][j] = (max(0, ans[i - 1][j]) + max(0, ans[i][j - 1])) % mod;
      |                                                      ~~~^~~~~~~~~~~~~~~~~~
/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:26:57: note:   deduced conflicting types for parameter 'const _Tp' ('int' and '__gnu_cxx::__alloc_traits<std::allocator<long int>, long int>::value_type' {aka 'long int'})
   26 |                 ans[i][j] = (max(0, ans[i - 1][j]) + max(0, ans[i][j - 1])) % mod;
      |                                                      ~~~^~~~~~~~~~~~~~~~~~
/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:26:57: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   26 |                 ans[i][j] = (max(0, ans[i - 1][j]) + max(0, ans[i][j - 1])) % mod;
      |                                                      ~~~^~~~~~~~~~~~~~~~~~