Language: C++

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef long double ld;
typedef long int li;
#define rep(i, n) for (ll i = 0; i < (ll)(n); i++)
typedef pair<int, int>P;
typedef tuple<ll, int, int>T;
#define PI 3.14159265358979
int x1,y1,x2,y2;
int H,W,K;

int main(){
  
  cin>>H>>W>>K>>x1>>y1>>x1>>y2;
  x1--;y1--;x2--;y2--;
  char dp[H][W];
  int memo[H][W]; 
  rep(i,H){
    rep(j,W){
      cin>>dp[i][j];
      memo[i][j]=10000000;
    } 
  }
  memo[x1][y1]=0;  
   queue<P>qu;
   qu.push(P(x1,y1));
  while(!qu.empty()){
    auto t=qu.front();qu.pop();
    t.first=x;t.second=y;
    for(int i=1;i<=K;i++){
      if(x+i<H){
        if(dp[x+i][y]=='@'){break;}
        if(memo[x+i][y]>memo[x][y]+1){
          memo[x+i][y]=memo[x][y]+1;
          qu.push(P(x+i,y));
        }
      }
    }
    for(int i=1;i<=K;i++){
      if(y+i<W){
        if(dp[x][y+i]=='@'){break;}
        if(memo[x][y+i]>memo[x][y]+1){
          memo[x][y+i]=memo[x][y]+1;
          qu.push(P(x,y+i));
        }
      }
    }
    for(int i=1;i<=K;i++){
      if(x-i<0){break;}
      if(dp[x-i][y]=='@'){break;}
      if(memo[x-i][y]>memo[x][y]+1){
        memo[x-i][y]=memo[x][y]+1;
        qu.push(P(x-i,y));
      }
    }
    for(int i=1;i<=K;i++){
      if(y-i<0){break;}
      if(dp[x][y-i]=='@'){break;}
      if(memo[x][y-i]>memo[x][y]+1){
      memo[x][y-i]=memo[x][y]+1;
        qu.push(P(x,y-i));
      }
    }
  }
  if(memo[x2][y2]!=10000000){
  cout<<memo[x2][y2];
  }
  else{cout<<-1;}
}

Compiler output:
a.cc:10:8: error: 'int y1' redeclared as different kind of entity
   10 | int x1,y1,x2,y2;
      |        ^~
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/cassert:43,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:33,
                 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 'int main()':
a.cc:15:19: error: no match for 'operator>>' (operand types are 'std::basic_istream<char>::__istream_type' {aka 'std::basic_istream<char>'} and 'double(double) noexcept')
   15 |   cin>>H>>W>>K>>x1>>y1>>x1>>y2;
      |   ~~~~~~~~~~~~~~~~^~~~
      |               |     |
      |               |     double(double) noexcept
      |               std::basic_istream<char>::__istream_type {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:15:21: error: cannot bind non-const lvalue reference of type 'bool&' to a value of type 'double (*)(double) noexcept'
   15 |   cin>>H>>W>>K>>x1>>y1>>x1>>y2;
      |                     ^~
/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:15:21: error: invalid conversion from 'double (*)(double) noexcept' to 'short int' [-fpermissive]
   15 |   cin>>H>>W>>K>>x1>>y1>>x1>>y2;
      |                     ^~
      |                     |
      |                     double (*)(double) noexcept
a.cc:15:21: 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:15:21: error: invalid conversion from 'double (*)(double) noexcept' to 'short unsigned int' [-fpermissive]
   15 |   cin>>H>>W>>K>>x1>>y1>>x1>>y2;
      |                     ^~
      |                     |
      |                     double (*)(double) noexcept
a.cc:15:21: 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:15:21: error: invalid conversion from 'double (*)(double) noexcept' to 'int' [-fpermissive]
   15 |   cin>>H>>W>>K>>x1>>y1>>x1>>y2;
      |                     ^~
      |                     |
      |                     double (*)(double) noexcept
a.cc:15:21: 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:15:21: error: invalid conversion from 'double (*)(double) noexcept' to 'unsigned int' [-fpermissive]
   15 |   cin>>H>>W>>K>>x1>>y1>>x1>>y2;
      |                     ^~
      |                     |
      |                     double (*)(double) noexcept
a.cc:15:21: 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:15:21: error: invalid conversion from 'double (*)(double) noexcept' to 'long int' [-fpermissive]
   15 |   cin>>H>>W>>K>>x1>>y1>>x1>>y2;
      |                     ^~
      |                     |
      |                     double (*)(double) noexcept
a.cc:15:21: 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:15:21: error: invalid conversion from 'double (*)(double) noexcept' to 'long unsigned int' [-fpermissive]
   15 |   cin>>H>>W>>K>>x1>>y1>>x1>>y2;
      |                     ^~
      |                     |
      |                     double (*)(double) noexcept
a.cc:15:21: 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:15:21: error: invalid conversion from 'double (*)(double) noexcept' to 'long long int' [-fpermissive]
   15 |   cin>>H>>W>>K>>x1>>y1>>x1>>y2;
      |                     ^~
      |                     |
      |                     double (*)(double) noexcept
a.cc:15:21: 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:15:21: error: invalid conversion from 'double (*)(double) noexcept' to 'long long unsigned int' [-fpermissive]
   15 |   cin>>H>>W>>K>>x1>>y1>>x1>>y2;
      |                     ^~
      |                     |
      |                     double (*)(double) noexcept
a.cc:15:21: 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:15:21: error: invalid conversion from 'double (*)(double) noexcept' to 'void*' [-fpermissive]
   15 |   cin>>H>>W>>K>>x1>>y1>>x1>>y2;
      |                     ^~
      |                     |
      |                     double (*)(double) noexcept
a.cc:15:21: 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:15:21: 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]
   15 |   cin>>H>>W>>K>>x1>>y1>>x1>>y2;
      |                     ^~
      |                     |
      |                     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:15:21: error: invalid conversion from 'double (*)(double) no