Language: C++

#include<bits/stdc++.h>
#define ff first
#define ss second
#define pi acos(-1.0)
#define finp ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
using namespace std;
long long int n,x1,x2,y1,y2,start;
long long int arr[500500],brr[500500],crr[500500];
const long long int infi=1e15;
pair<long long int,long long int> pa[500500];
bool compare(pair<long long int,long long int> p1,pair<long long int,long long int > p2)
{
    if(p1.first<p2.first)
        return true;
    return false;
}
int main()
{
    finp;
    cin>>x1>>y1>>x2>>y2;
    cin>>n;
    for(int i=0;i<n;i++)
        cin>>arr[i]>>brr[i];
    if(x1>x2 || (y1>y2 && x1==x2))
    {
        swap(x1,x2);
        swap(y1,y2);
    }
    if(y2<y1)
    {
        y1=infi-y1;
        y2=infi-y2;
        for(int i=0;i<n;i++)
            brr[i]=infi-brr[i];
    }
    y2-=y1;
    x2-=x1;
    for(int i=0;i<n;i++)
    {
        brr[i]-=y1;
        arr[i]-=x1;
    }
    x1=y1=0;
    while(start<n)
    {
        if(arr[start]<0 || brr[start]<0 || arr[start]>x2 || brr[start]>y2)
        {
            n--;
            brr[start]=brr[n];
            arr[start]=arr[n];
        }
        else
            start++;
    }
    if(x2<y2)
    {
        swap(y2,x2);
        for(int i=0;i<n;i++)
            swap(arr[i],brr[i]);
    }
    for(int i=0;i<n;i++)
    {
        pa[i].ff=brr[i];
        pa[i].ss=arr[i];
    }
    sort(pa,pa+n,compare);
    for(int i=0;i<n;i++)
    {
        arr[i]=pa[i].ss;
        brr[i]=pa[i].ff;
    }
    if(y2==0)
    {
        double ans=((x2+y2)*100);
        ans-=(2-pi)*10;
        return cout<<fixed<<showpoint<<setprecision(15)<<ans<<endl,0;
    }
    for(int i=0;i<=n;i++)
        crr[i]=infi;
    crr[0]=-1;
    for(int i=0;i<n;i++)
    {
        auto temp=lower_bound(crr,crr+n,arr[i]);
        *temp=arr[i];
    }
    double ans=0;
    for(int i=0;i<=n;i++)
    {
        if(crr[i]<infi)
            ans=i;
    }
    double ans1=(x2+y2)*100;
    ans1-=(ans*(2-pi/2))*10;
    cout<<fixed<<showpoint<<setprecision(15)<<ans1<<endl;
return 0;
}


Compiler output:
a.cc:7:23: error: 'long long int y1' redeclared as different kind of entity
    7 | long long int n,x1,x2,y1,y2,start;
      |                       ^~
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:20:12: error: no match for 'operator>>' (operand types are 'std::basic_istream<char>::__istream_type' {aka 'std::basic_istream<char>'} and 'double(double) noexcept')
   20 |     cin>>x1>>y1>>x2>>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:20:14: error: cannot bind non-const lvalue reference of type 'bool&' to a value of type 'double (*)(double) noexcept'
   20 |     cin>>x1>>y1>>x2>>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:20:14: error: invalid conversion from 'double (*)(double) noexcept' to 'short int' [-fpermissive]
   20 |     cin>>x1>>y1>>x2>>y2;
      |              ^~
      |              |
      |              double (*)(double) noexcept
a.cc:20:14: 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:20:14: error: invalid conversion from 'double (*)(double) noexcept' to 'short unsigned int' [-fpermissive]
   20 |     cin>>x1>>y1>>x2>>y2;
      |              ^~
      |              |
      |              double (*)(double) noexcept
a.cc:20:14: 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:20:14: error: invalid conversion from 'double (*)(double) noexcept' to 'int' [-fpermissive]
   20 |     cin>>x1>>y1>>x2>>y2;
      |              ^~
      |              |
      |              double (*)(double) noexcept
a.cc:20:14: 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:20:14: error: invalid conversion from 'double (*)(double) noexcept' to 'unsigned int' [-fpermissive]
   20 |     cin>>x1>>y1>>x2>>y2;
      |              ^~
      |              |
      |              double (*)(double) noexcept
a.cc:20:14: 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:20:14: error: invalid conversion from 'double (*)(double) noexcept' to 'long int' [-fpermissive]
   20 |     cin>>x1>>y1>>x2>>y2;
      |              ^~
      |              |
      |              double (*)(double) noexcept
a.cc:20:14: 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:20:14: error: invalid conversion from 'double (*)(double) noexcept' to 'long unsigned int' [-fpermissive]
   20 |     cin>>x1>>y1>>x2>>y2;
      |              ^~
      |              |
      |              double (*)(double) noexcept
a.cc:20:14: 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:20:14: error: invalid conversion from 'double (*)(double) noexcept' to 'long long int' [-fpermissive]
   20 |     cin>>x1>>y1>>x2>>y2;
      |              ^~
      |              |
      |              double (*)(double) noexcept
a.cc:20:14: 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:20:14: error: invalid conversion from 'double (*)(double) noexcept' to 'long long unsigned int' [-fpermissive]
   20 |     cin>>x1>>y1>>x2>>y2;
      |              ^~
      |              |
      |              double (*)(double) noexcept
a.cc:20:14: 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:20:14: error: invalid conversion from 'double (*)(double) noexcept' to 'void*' [-fpermissive]
   20 |     cin>>x1>>y1>>x2>>y2;
      |              ^~
      |              |
      |              double (*)(double) noexcept
a.cc:20:14: 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:20:14: 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]
   20 |     cin>>x1>>y1>>x2>>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:20:14: 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]
   20 |     cin>>x1>>y1>>x2>>y2;
      |              ^~
      |              |
      |              double (*)(double)