Language: C++

#include<string>
#include<string.h>
#include<map>
#include<set>
#include<vector>
#include<stdio.h>
#include<math.h>
#include<iostream>
#include<algorithm>
#include<queue>
using namespace std;
int h,w;
char c[55][55];
int dx[]={0,1,0,-1};
int dy[]={1,0,-1,0};
int main()
{
  cin>>h>>w;
  for(int i=1;i<=h;i++)for(int j=1;j<=w;j++)cin>>c[i][j];
  for(int i=1;i<=h;i++)for(int j=1;j<=w;j++){
    int t=4;
    for(int k=0;k<4;k++)
      if(c[i+dx[k]][j+[dy[k]]!='#')t--;
    if(!t){
      cout<<"No"<<endl;
      return 0;
    }
  }
  cout<<"Yes"<<endl;
  system("pause");
  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:23:24: warning: capture of variable 'dy' with non-automatic storage duration
   23 |       if(c[i+dx[k]][j+[dy[k]]!='#')t--;
      |                        ^~
a.cc:15:5: note: 'int dy [4]' declared here
   15 | int dy[]={1,0,-1,0};
      |     ^~
a.cc:23:26: error: expected ',' before '[' token
   23 |       if(c[i+dx[k]][j+[dy[k]]!='#')t--;
      |                          ^
      |                          ,
a.cc:23:26: error: expected identifier before '[' token
a.cc: In lambda function:
a.cc:23:30: error: expected '{' before '!=' token
   23 |       if(c[i+dx[k]][j+[dy[k]]!='#')t--;
      |                              ^~
a.cc: In function 'int main()':
a.cc:23:22: error: no match for 'operator+' (operand types are 'int' and 'main()::<lambda()>')
   23 |       if(c[i+dx[k]][j+[dy[k]]!='#')t--;
      |                     ~^~~~~~~~
      |                     | |
      |                     | main()::<lambda()>
      |                     int
In file included from /usr/include/c++/14/string:48,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_iterator.h:627:5: note: candidate: 'template<class _Iterator> constexpr std::reverse_iterator<_Iterator> std::operator+(typename reverse_iterator<_Iterator>::difference_type, const reverse_iterator<_Iterator>&)'
  627 |     operator+(typename reverse_iterator<_Iterator>::difference_type __n,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:627:5: note:   template argument deduction/substitution failed:
a.cc:23:30: note:   'main()::<lambda()>' is not derived from 'const std::reverse_iterator<_Iterator>'
   23 |       if(c[i+dx[k]][j+[dy[k]]!='#')t--;
      |                              ^~
/usr/include/c++/14/bits/stl_iterator.h:1798:5: note: candidate: 'template<class _Iterator> constexpr std::move_iterator<_IteratorL> std::operator+(typename move_iterator<_IteratorL>::difference_type, const move_iterator<_IteratorL>&)'
 1798 |     operator+(typename move_iterator<_Iterator>::difference_type __n,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1798:5: note:   template argument deduction/substitution failed:
a.cc:23:30: note:   'main()::<lambda()>' is not derived from 'const std::move_iterator<_IteratorL>'
   23 |       if(c[i+dx[k]][j+[dy[k]]!='#')t--;
      |                              ^~
In file included from /usr/include/c++/14/string:54:
/usr/include/c++/14/bits/basic_string.h:3598:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3598 |     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3598:5: note:   template argument deduction/substitution failed:
a.cc:23:30: note:   mismatched types 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'int'
   23 |       if(c[i+dx[k]][j+[dy[k]]!='#')t--;
      |                              ^~
/usr/include/c++/14/bits/basic_string.h:3616:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const _CharT*, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3616 |     operator+(const _CharT* __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3616:5: note:   template argument deduction/substitution failed:
a.cc:23:30: note:   mismatched types 'const _CharT*' and 'int'
   23 |       if(c[i+dx[k]][j+[dy[k]]!='#')t--;
      |                              ^~
/usr/include/c++/14/bits/basic_string.h:3635:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(_CharT, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3635 |     operator+(_CharT __lhs, const basic_string<_CharT,_Traits,_Alloc>& __rhs)
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3635:5: note:   template argument deduction/substitution failed:
a.cc:23:30: note:   'main()::<lambda()>' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   23 |       if(c[i+dx[k]][j+[dy[k]]!='#')t--;
      |                              ^~
/usr/include/c++/14/bits/basic_string.h:3652:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, const _CharT*)'
 3652 |     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3652:5: note:   template argument deduction/substitution failed:
a.cc:23:30: note:   mismatched types 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'int'
   23 |       if(c[i+dx[k]][j+[dy[k]]!='#')t--;
      |                              ^~
/usr/include/c++/14/bits/basic_string.h:3670:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, _CharT)'
 3670 |     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs, _CharT __rhs)
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3670:5: note:   template argument deduction/substitution failed:
a.cc:23:30: note:   mismatched types 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'int'
   23 |       if(c[i+dx[k]][j+[dy[k]]!='#')t--;
      |                              ^~
/usr/include/c++/14/bits/basic_string.h:3682:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(__cxx11::basic_string<_CharT, _Traits, _Allocator>&&, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3682 |     operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3682:5: note:   template argument deduction/substitution failed:
a.cc:23:30: note:   mismatched types 'std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'int'
   23 |       if(c[i+dx[k]][j+[dy[k]]!='#')t--;
      |                              ^~
/usr/include/c++/14/bits/basic_string.h:3689:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, __cxx11::basic_string<_CharT, _Traits, _Allocator>&&)'
 3689 |     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3689:5: note:   template argument deduction/substitution failed:
a.cc:23:30: note:   mismatched types 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'int'
   23 |       if(c[i+dx[k]][j+[dy[k]]!='#')t--;
      |                              ^~
/usr/include/c++/14/bits/basic_string.h:3696:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(__cxx11::basic_string<_CharT, _Traits, _Allocator>&&, __cxx11::basic_string<_CharT, _Traits, _Allocator>&&)'
 3696 |     operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3696:5: note:   template argument deduction/substitution failed:
a.cc:23:30: note:   mismatched types 'std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'int'
   23 |       if(c[i+dx[k]][j+[dy[k]]!='#')t--;
      |                              ^~
/usr/include/c++/14/bits/basic_string.h:3719:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const _CharT*, __cxx11::basic_string<_CharT, _Traits, _Allocator>&&)'
 3719 |     operator+(const _CharT* __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3719:5: note:   template argument deduction/substitution failed:
a.cc:23:30: note:   mismatched types 'const _CharT*' and 'int'
   23 |       if(c[i+dx[k]][j+[dy[k]]!='#')t--;
      |                              ^~
/usr/include/c++/14/bits/basic_string.h:3726:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(_CharT, __cxx11::basic_string<_CharT, _Traits, _Allocator>&&)'
 3726 |     operator+(_CharT __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3726:5: note:   template argument deduction/substitution failed:
a.cc:23:30: note:   'main()::<lambda()>' is not derived from 'std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   23 |       if(c[i+dx[k]][j+[dy[k]]!='#')t--;
      |                              ^~
/usr/include/c++/14/bits/basic_string.h:3733:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(__cxx11::basic_string<_CharT, _Traits, _Allocator>&&, const _CharT*)'
 3733 |     operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3733:5: note:   template argument deduction/substitution failed:
a.cc:23:30: note:   mismatched types 'std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'int'
   23 |       if(c[i+dx[k]][j+[dy[k]]!='#')t--;
      |                              ^~
/usr/include/c++/14/bits/basic_string.h:3740:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(__cxx11::basic_string<_CharT, _Traits, _Allocator>&&, _CharT)'
 3740 |     operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3740:5: note:   template argument deduction/substitution failed:
a.cc:23:30: note:   mismatched types 'std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'int'
   23 |       if(c[i+dx[k]][j+[dy[k]]!='#')t--;
      |