Language: C++

#include <bits/stdc++.h>
using namespace std;
 
int main()
{
  int i , j ;
  int H , W ;
  std::string A[H][W];
  std::string B[H];
  int a , ans ;
  
  cin >> H , W ;
  
  for(i=1;i<=H;i++){
  cin >> B[i]
  }
  
  for(i=1;i<=W;i++){
    for(j=1;j<=H;j++){
      cin >> A[B[i].at(j),i]
    }
  }
  
  for(i=1;i<=W;i++){
    for(j=1;j<=H;j++){
      if(A[i,j] == '#'){
        a++ ; 
      }
      if(a <= ans)
        ans = a ;
    }
  }

Compiler output:
a.cc: In function 'int main()':
a.cc:15:14: error: expected ';' before '}' token
   15 |   cin >> B[i]
      |              ^
      |              ;
   16 |   }
      |   ~           
a.cc:20:23: warning: ignoring return value of 'std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::reference std::__cxx11::basic_string<_CharT, _Traits, _Alloc>::at(size_type) [with _CharT = char; _Traits = std::char_traits<char>; _Alloc = std::allocator<char>; reference = char&; size_type = long unsigned int]', declared with attribute 'nodiscard' [-Wunused-result]
   20 |       cin >> A[B[i].at(j),i]
      |                ~~~~~~~^~~
In file included from /usr/include/c++/14/string:54,
                 from /usr/include/c++/14/bitset:52,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:52,
                 from a.cc:1:
/usr/include/c++/14/bits/basic_string.h:1309:7: note: declared here
 1309 |       at(size_type __n)
      |       ^~
a.cc:20:11: error: no match for 'operator>>' (operand types are 'std::istream' {aka 'std::basic_istream<char>'} and 'std::string [W]' {aka 'std::__cxx11::basic_string<char> [W]'})
   20 |       cin >> A[B[i].at(j),i]
      |       ~~~ ^~ ~~~~~~~~~~~~~~~
      |       |                    |
      |       |                    std::string [W] {aka std::__cxx11::basic_string<char> [W]}
      |       std::istream {aka std::basic_istream<char>}
In file included from /usr/include/c++/14/sstream:40,
                 from /usr/include/c++/14/complex:45,
                 from /usr/include/c++/14/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:127:
/usr/include/c++/14/istream:170:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(bool&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  170 |       operator>>(bool& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:170:7: note:   conversion of argument 1 would be ill-formed:
a.cc:20:28: error: cannot bind non-const lvalue reference of type 'bool&' to a value of type 'std::string*' {aka 'std::__cxx11::basic_string<char>*'}
   20 |       cin >> A[B[i].at(j),i]
      |              ~~~~~~~~~~~~~~^
/usr/include/c++/14/istream:174:7: note: candidate: 'std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(short int&) [with _CharT = char; _Traits = std::char_traits<char>]' (near match)
  174 |       operator>>(short& __n);
      |       ^~~~~~~~
/usr/include/c++/14/istream:174:7: note:   conversion of argument 1 would be ill-formed:
a.cc:20:28: error: invalid conversion from 'std::string*' {aka 'std::__cxx11::basic_string<char>*'} to 'short int' [-fpermissive]
   20 |       cin >> A[B[i].at(j),i]
      |              ~~~~~~~~~~~~~~^
      |                            |
      |                            std::string* {aka std::__cxx11::basic_string<char>*}
a.cc:20:28: error: cannot bind rvalue '(short int)((std::string*)(& A[(((void)B[i].std::__cxx11::basic_string<char>::at(((std::__cxx11::basic_string<char>::size_type)j))), i)]))' to 'short int&'
/usr/include/c++/14/istream:177:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(short unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  177 |       operator>>(unsigned short& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:177:7: note:   conversion of argument 1 would be ill-formed:
a.cc:20:28: error: invalid conversion from 'std::string*' {aka 'std::__cxx11::basic_string<char>*'} to 'short unsigned int' [-fpermissive]
   20 |       cin >> A[B[i].at(j),i]
      |              ~~~~~~~~~~~~~~^
      |                            |
      |                            std::string* {aka std::__cxx11::basic_string<char>*}
a.cc:20:28: error: cannot bind rvalue '(short unsigned int)((std::string*)(& A[(((void)B[i].std::__cxx11::basic_string<char>::at(((std::__cxx11::basic_string<char>::size_type)j))), i)]))' to 'short unsigned int&'
/usr/include/c++/14/istream:181:7: note: candidate: 'std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(int&) [with _CharT = char; _Traits = std::char_traits<char>]' (near match)
  181 |       operator>>(int& __n);
      |       ^~~~~~~~
/usr/include/c++/14/istream:181:7: note:   conversion of argument 1 would be ill-formed:
a.cc:20:28: error: invalid conversion from 'std::string*' {aka 'std::__cxx11::basic_string<char>*'} to 'int' [-fpermissive]
   20 |       cin >> A[B[i].at(j),i]
      |              ~~~~~~~~~~~~~~^
      |                            |
      |                            std::string* {aka std::__cxx11::basic_string<char>*}
a.cc:20:28: error: cannot bind rvalue '(int)((std::string*)(& A[(((void)B[i].std::__cxx11::basic_string<char>::at(((std::__cxx11::basic_string<char>::size_type)j))), i)]))' to 'int&'
/usr/include/c++/14/istream:184:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  184 |       operator>>(unsigned int& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:184:7: note:   conversion of argument 1 would be ill-formed:
a.cc:20:28: error: invalid conversion from 'std::string*' {aka 'std::__cxx11::basic_string<char>*'} to 'unsigned int' [-fpermissive]
   20 |       cin >> A[B[i].at(j),i]
      |              ~~~~~~~~~~~~~~^
      |                            |
      |                            std::string* {aka std::__cxx11::basic_string<char>*}
a.cc:20:28: error: cannot bind rvalue '(unsigned int)((std::string*)(& A[(((void)B[i].std::__cxx11::basic_string<char>::at(((std::__cxx11::basic_string<char>::size_type)j))), i)]))' to 'unsigned int&'
/usr/include/c++/14/istream:188:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  188 |       operator>>(long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:188:7: note:   conversion of argument 1 would be ill-formed:
a.cc:20:28: error: invalid conversion from 'std::string*' {aka 'std::__cxx11::basic_string<char>*'} to 'long int' [-fpermissive]
   20 |       cin >> A[B[i].at(j),i]
      |              ~~~~~~~~~~~~~~^
      |                            |
      |                            std::string* {aka std::__cxx11::basic_string<char>*}
a.cc:20:28: error: cannot bind rvalue '(long int)((std::string*)(& A[(((void)B[i].std::__cxx11::basic_string<char>::at(((std::__cxx11::basic_string<char>::size_type)j))), i)]))' to 'long int&'
/usr/include/c++/14/istream:192:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  192 |       operator>>(unsigned long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:192:7: note:   conversion of argument 1 would be ill-formed:
a.cc:20:28: error: invalid conversion from 'std::string*' {aka 'std::__cxx11::basic_string<char>*'} to 'long unsigned int' [-fpermissive]
   20 |       cin >> A[B[i].at(j),i]
      |              ~~~~~~~~~~~~~~^
      |                            |
      |                            std::string* {aka std::__cxx11::basic_string<char>*}
a.cc:20:28: error: cannot bind rvalue '(long unsigned int)((std::string*)(& A[(((void)B[i].std::__cxx11::basic_string<char>::at(((std::__cxx11::basic_string<char>::size_type)j))), i)]))' to 'long unsigned int&'
/usr/include/c++/14/istream:199:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long long int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  199 |       operator>>(long long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:199:7: note:   conversion of argument 1 would be ill-formed:
a.cc:20:28: error: invalid conversion from 'std::string*' {aka 'std::__cxx11::basic_string<char>*'} to 'long long int' [-fpermissive]
   20 |       cin >> A[B[i].at(j),i]
      |              ~~~~~~~~~~~~~~^
      |                            |
      |                            std::string* {aka std::__cxx11::basic_string<char>*}
a.cc:20:28: error: cannot bind rvalue '(long long int)((std::string*)(& A[(((void)B[i].std::__cxx11::basic_string<char>::at(((std::__cxx11::basic_string<char>::size_type)j))), i)]))' to 'long long int&'
/usr/include/c++/14/istream:203:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long long unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  203 |       operator>>(unsigned long long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:203:7: note:   conversion of argument 1 would be ill-formed:
a.cc:20:28: error: invalid conversion from 'std::string*' {aka 'std::__cxx11::basic_string<char>*'} to 'long long unsigned int' [-fpermissive]
   20 |       cin >> A[B[i].at(j),i]
      |              ~~~~~~~~~~~~~~^
      |                            |
      |                            std::string* {aka std::__cxx11::basic_string<char>*}
a.cc:20:28: error: cannot bind rvalue '(long long unsigned int)((std::string*)(& A[(((void)B[i].std::__cxx11::basic_string<char>::at(((std::__cxx11::basic_string<char>::size_type)j))), i)]))' to 'long long unsigned int&'
/usr/include/c++/14/istream:328:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(void*&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  328 |       operator>>(void*& __