Language: C++

#include <bits/stdc++.h>
#define pb push_back
#define long long long
#define pll pair < long , long >
#define vll vector < pll >
#define ml map < long , long >
#define mll map < pll , long >
#define x first
#define y second
#define vl vector < long >
#define io ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
using namespace std;
int N;  // limit for array size  // array size
long x1,y1,x2,y2,n,i,j,mx,Mx,my,My,q,x[200005],y[200005];
int t[400005]={0};

void modify(int p, int value) {  // set value at position p
  for (t[p += N] = value; p > 1; p >>= 1) t[p>>1] = max(t[p],t[p^1]);
}

int query(int l, int r) {  // sum on interval [l, r)
  int res = 0;
  for (l += N, r += N; l < r; l >>= 1, r >>= 1) {
    if (l&1) res = max(res,t[l++]);
    if (r&1) res = max(res,t[--r]);
  }
  return res;
}
int main()
{
    io
    cout<<fixed<<setprecision(20);
    ml mpx,mpy;
    ml :: iterator it;
    cin>>x1>>y1>>x2>>y2>>n;
    double ans=100*(abs(y2-y1)+abs(x2-x1)),dd;
    mpx[x1]=1;
    mpx[x2]=1;
    mpy[y1]=1;
    mpy[y2]=1;
    for(i=0;i<n;++i)
    {
        cin>>x[i]>>y[i];
        mpx[x[i]]=1;
        mpy[y[i]]=1;
    }
    j=0;
    for(it=mpx.begin();it!=mpx.end();it++)
    it->y=j++;
    j=0;
    for(it=mpy.begin();it!=mpy.end();it++)
    it->y=j++;
    for(i=0;i<n;++i)
    {
        x[i]=mpx[x[i]];
        y[i]=mpy[y[i]];
    }
    x1=mpx[x1];
    x2=mpx[x2];
    y1=mpy[y1];
    y2=mpy[y2];
    mx=min(x1,x2);
    my=min(y1,y2);
    Mx=max(x1,x2);
    My=max(y1,y2);
    vll v;
    for(i=0;i<n;++i)
    if(x[i]>=mx && x[i]<=Mx && y[i]>=my && y[i]<=My)
    v.pb({x[i],y[i]});
    sort(v.begin(),v.end());
    N=n+1;
    n=v.size();
    for(i=n-1;i>=0;--i)
    {
        q=query(v[i].y,j+1);
        modify(v[i].y,q+1);
    }
    dd=query(0,j+1);
    if(x1==x2 || y1==y2)
    {
        if(dd) cout<<ans+11.415926535897932384626433832795;
        else cout<<ans;
        return 0;
    }
    cout<<ans-dd*4.2920367320510338076867830836025;
    return 0;
}


Compiler output:
a.cc:14:9: error: 'long long int y1' redeclared as different kind of entity
   14 | long x1,y1,x2,y2,n,i,j,mx,Mx,my,My,q,x[200005],y[200005];
      |         ^~
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:35:12: error: no match for 'operator>>' (operand types are 'std::basic_istream<char>::__istream_type' {aka 'std::basic_istream<char>'} and 'double(double) noexcept')
   35 |     cin>>x1>>y1>>x2>>y2>>n;
      |     ~~~~~~~^~~~
      |        |     |
      |        |     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:35:14: error: cannot bind non-const lvalue reference of type 'bool&' to a value of type 'double (*)(double) noexcept'
   35 |     cin>>x1>>y1>>x2>>y2>>n;
      |              ^~
/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:35:14: error: invalid conversion from 'double (*)(double) noexcept' to 'short int' [-fpermissive]
   35 |     cin>>x1>>y1>>x2>>y2>>n;
      |              ^~
      |              |
      |              double (*)(double) noexcept
a.cc:35:14: 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:35:14: error: invalid conversion from 'double (*)(double) noexcept' to 'short unsigned int' [-fpermissive]
   35 |     cin>>x1>>y1>>x2>>y2>>n;
      |              ^~
      |              |
      |              double (*)(double) noexcept
a.cc:35:14: 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:35:14: error: invalid conversion from 'double (*)(double) noexcept' to 'int' [-fpermissive]
   35 |     cin>>x1>>y1>>x2>>y2>>n;
      |              ^~
      |              |
      |              double (*)(double) noexcept
a.cc:35:14: 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:35:14: error: invalid conversion from 'double (*)(double) noexcept' to 'unsigned int' [-fpermissive]
   35 |     cin>>x1>>y1>>x2>>y2>>n;
      |              ^~
      |              |
      |              double (*)(double) noexcept
a.cc:35:14: 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:35:14: error: invalid conversion from 'double (*)(double) noexcept' to 'long int' [-fpermissive]
   35 |     cin>>x1>>y1>>x2>>y2>>n;
      |              ^~
      |              |
      |              double (*)(double) noexcept
a.cc:35:14: 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:35:14: error: invalid conversion from 'double (*)(double) noexcept' to 'long unsigned int' [-fpermissive]
   35 |     cin>>x1>>y1>>x2>>y2>>n;
      |              ^~
      |              |
      |              double (*)(double) noexcept
a.cc:35:14: 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:35:14: error: invalid conversion from 'double (*)(double) noexcept' to 'long long int' [-fpermissive]
   35 |     cin>>x1>>y1>>x2>>y2>>n;
      |              ^~
      |              |
      |              double (*)(double) noexcept
a.cc:35:14: 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:35:14: error: invalid conversion from 'double (*)(double) noexcept' to 'long long unsigned int' [-fpermissive]
   35 |     cin>>x1>>y1>>x2>>y2>>n;
      |              ^~
      |              |
      |              double (*)(double) noexcept
a.cc:35:14: 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:35:14: error: invalid conversion from 'double (*)(double) noexcept' to 'void*' [-fpermissive]
   35 |     cin>>x1>>y1>>x2>>y2>>n;
      |              ^~
      |              |
      |              double (*)(double) noexcept
a.cc:35:14: 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:35:14: 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]
   35 |     cin>>x1>>y1>>x2>>y2>>n;
      |              ^~
      |              |
      |              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:35:14: error: invalid conversion from 'double (*)(double) noexcept' to 'std::basic_istream<char>::__ios_type& (*)(std::basic_istream<char>::__ios_type&)' {aka 'std::basic_ios<char>& (*)(std::basic_ios<char>&)'} [-fpermissive]
   35 |     cin>>x1>>y1>>x2>>y2>>n;
      |              ^~
      |