Language: C++

#include <iostream>
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
char s[1003][1003];
int dp[1003][1003];
int yd[5]={1,-1,0,-2,2};
int yd1[5]={1,-1,0,-2,2};
int h,w;
  int x,y,x1,y1;
void dfs(int x,int y,int sum)
{
     if(s[x][y]=='#'||x>h||x<=0||y>w||y<0)return ;
   if(sum<dp[x][y]||dp[x][y]==-1)dp[x][y]=sum;
   else return ;
    if(dp[x1][y1]!=-1)return ;
    dfs(x+1,y,dp[x][y]);
    dfs(x-1,y,dp[x][y]);
    dfs(x,y-1,dp[x][y]);
    dfs(x,y+1,dp[x][y]);
   for(int i=1;i<=5;i++)
    for(int j=1;j<=5;j++)
    {  if(yd[i]==0&&yd1[j]==0)continue;
        int x11=x+yd[i];
       int y11=y+yd1[j];
        dfs(x11,y11,dp[x][y]+1);
    }
}
int main()
{


  cin>>h>>w>>x>>y>>x1>>y1;
  for(int i=1;i<=h;i++)
    for(int j=1;j<=w;j++)
    dp[i][j]=-1;
  for(int i=1;i<=h;i++)
    for(int j=1;j<=w;j++)
    cin>>s[i][j];
     dfs(x,y,0);
  if(dp[x1][y1]==-1)cout<<-1;
  else cout<<dp[x1][y1];
}


Compiler output:
a.cc:10:14: error: 'int y1' redeclared as different kind of entity
   10 |   int x,y,x1,y1;
      |              ^~
In file included from /usr/include/features.h:523,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/os_defines.h:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/c++config.h:683,
                 from /usr/include/c++/14/bits/requires_hosted.h:31,
                 from /usr/include/c++/14/iostream:38,
                 from a.cc:1:
/usr/include/x86_64-linux-gnu/bits/mathcalls.h:257:1: note: previous declaration 'double y1(double)'
  257 | __MATHCALL (y1,, (_Mdouble_));
      | ^~~~~~~~~~
a.cc: In function 'void dfs(int, int, int)':
a.cc:16:14: error: invalid types 'int [1003][double(double) noexcept]' for array subscript
   16 |     if(dp[x1][y1]!=-1)return ;
      |              ^
a.cc: In function 'int main()':
a.cc:33:22: error: no match for 'operator>>' (operand types are 'std::basic_istream<char>::__istream_type' {aka 'std::basic_istream<char>'} and 'double(double) noexcept')
   33 |   cin>>h>>w>>x>>y>>x1>>y1;
      |   ~~~~~~~~~~~~~~~~~~~^~~~
      |                  |     |
      |                  |     double(double) noexcept
      |                  std::basic_istream<char>::__istream_type {aka std::basic_istream<char>}
In file included from /usr/include/c++/14/iostream:42:
/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:33:24: error: cannot bind non-const lvalue reference of type 'bool&' to a value of type 'double (*)(double) noexcept'
   33 |   cin>>h>>w>>x>>y>>x1>>y1;
      |                        ^~
/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:33:24: error: invalid conversion from 'double (*)(double) noexcept' to 'short int' [-fpermissive]
   33 |   cin>>h>>w>>x>>y>>x1>>y1;
      |                        ^~
      |                        |
      |                        double (*)(double) noexcept
a.cc:33:24: error: cannot bind rvalue '(short int)y1' 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:33:24: error: invalid conversion from 'double (*)(double) noexcept' to 'short unsigned int' [-fpermissive]
   33 |   cin>>h>>w>>x>>y>>x1>>y1;
      |                        ^~
      |                        |
      |                        double (*)(double) noexcept
a.cc:33:24: error: cannot bind rvalue '(short unsigned int)y1' 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:33:24: error: invalid conversion from 'double (*)(double) noexcept' to 'int' [-fpermissive]
   33 |   cin>>h>>w>>x>>y>>x1>>y1;
      |                        ^~
      |                        |
      |                        double (*)(double) noexcept
a.cc:33:24: error: cannot bind rvalue '(int)y1' 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:33:24: error: invalid conversion from 'double (*)(double) noexcept' to 'unsigned int' [-fpermissive]
   33 |   cin>>h>>w>>x>>y>>x1>>y1;
      |                        ^~
      |                        |
      |                        double (*)(double) noexcept
a.cc:33:24: error: cannot bind rvalue '(unsigned int)y1' 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:33:24: error: invalid conversion from 'double (*)(double) noexcept' to 'long int' [-fpermissive]
   33 |   cin>>h>>w>>x>>y>>x1>>y1;
      |                        ^~
      |                        |
      |                        double (*)(double) noexcept
a.cc:33:24: error: cannot bind rvalue '(long int)y1' 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:33:24: error: invalid conversion from 'double (*)(double) noexcept' to 'long unsigned int' [-fpermissive]
   33 |   cin>>h>>w>>x>>y>>x1>>y1;
      |                        ^~
      |                        |
      |                        double (*)(double) noexcept
a.cc:33:24: error: cannot bind rvalue '(long unsigned int)y1' 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:33:24: error: invalid conversion from 'double (*)(double) noexcept' to 'long long int' [-fpermissive]
   33 |   cin>>h>>w>>x>>y>>x1>>y1;
      |                        ^~
      |                        |
      |                        double (*)(double) noexcept
a.cc:33:24: error: cannot bind rvalue '(long long int)y1' 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:33:24: error: invalid conversion from 'double (*)(double) noexcept' to 'long long unsigned int' [-fpermissive]
   33 |   cin>>h>>w>>x>>y>>x1>>y1;
      |                        ^~
      |                        |
      |                        double (*)(double) noexcept
a.cc:33:24: error: cannot bind rvalue '(long long unsigned int)y1' 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*& __p)
      |       ^~~~~~~~
/usr/include/c++/14/istream:328:7: note:   conversion of argument 1 would be ill-formed:
a.cc:33:24: error: invalid conversion from 'double (*)(double) noexcept' to 'void*' [-fpermissive]
   33 |   cin>>h>>w>>x>>y>>x1>>y1;
      |                        ^~
      |                        |
      |                        double (*)(double) noexcept
a.cc:33:24: error: cannot bind rvalue '(void*)y1' to 'void*&'
/usr/include/c++/14/istream:122:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(__istream_type& (*)(__istream_type&)) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  122 |       operator>>(__istream_type& (*__pf)(__istream_type&))
      |       ^~~~~~~~
/usr/include/c++/14/istream:122:7: note:   conversion of argument 1 would be ill-formed:
a.cc:33:24: error: invalid conversion from 'double (*)(double) noexcept' to 'std::basic_istream<char>::__istream_type& (*)(std::basic_istream<char>::__istream_type&)' {aka 'std::basic_istream<char>& (*)(std::basic_istream<char>&)'} [-fpermissive]
   33 |   cin>>h>>w>>x>>y>>x1>>y1;
      |                        ^~
      |                        |
      |                        double (*)(double) noexcept
/usr/include/c++/14/istream:126:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(__ios_type& (*)(__ios_type&)) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>; __ios_type = std::basic_ios<char>]' (near match)
  126 |       operator>>(__ios_type& (*__pf)(__ios_type&))
      |       ^~~~~~~~
/usr/include/c++/14/istream:126:7: note:   conversion of argument 1 would be ill-formed:
a.cc:33: