Language: C++

#include <iostream>
#include <stdlib.h>
#include <utility>
using namespace std;
const int MaxN=100003;
int n,c,k,res=0,nnx=0,nny=0;
bool dau[MaxN];
struct ta{ int x,y;};

ta a[MaxN];
ta b[2*MaxN],trx[8*MaxN],idx[MaxN],idy[MaxN],trey[8*MaxN];
void upx(int i){
    if (idx[i]==0){
        nnx++;
        idx[i]=nnx;
        trx[nnx]=i;
    }
    int cha=nnx,hh=a[i].x,con=cha/2;
    while (con>0){
        if (a[trx[cha]].x<=hh) break;
        trx[cha*2]=trx[cha];
        idx[trx[cha]]=cha*2;
        cha=con;
        con=cha/2;
    }
    idx[i]=cha;
    trx[cha]=i;
}
void upy(int i){
    if (idy[i]==0){
        nny++;
        idy[i]=nny;
        trey[nny]=i;
    }
    int cha=nny,hh=a[i].y,con=cha/2;
    while (con>0){
        if (a[trey[cha]].x<=hh) break;
        trey[cha*2]=trey[cha];
        idy[trey[cha]]=cha*2;
        cha=con;
        con=cha/2;
    }
    idy[i]=cha;
    trey[cha]=i;
}
void downx(){
}
void downy(int i){
    int cha=i,con=cha*2,hh=a[trey[i]].y;
    while (con<=nny){
        if (con<nny && a[trey[con]].y>a[trey[con+1]].y) con++;
        if (hh<=a[trey[con]].y) break;
        trey[cha]=trey[con];
        idy[trey[con]]=cha;
        cha=con;
        con=cha*2;
    }
    idy[i]=cha;
    trey[cha]=i;
}
int popx(){
    int i=trx[1];
    trx[1]=trx[nnx];
    idx[trx[nnx]]=1;
    idx[i]=0;
    nnx--;
    downx();
    return i;
}
int popy(int i){
    int j=trey[i];
    trey[i]=trey[nny];
    idy[trey[nny]]=i;
    nny--;
    downy(i);
    idy[j]=0;
    return j;
}
void Sort(int l,int r){
    int hh=(rand % (r-l+1))+l;
    int i=l,j=r;
    while (i<j){
        while ( (a[hh].x>a[i].x)||(a[hh].x==a[i].x && a[i].y<a[hh].y)) i++;
        while ( (a[hh].x<a[j].x)||(a[hh].x==a[j].x && a[j].y>a[hh].y)) j--;
        if (i<=j){
            swap(a[i],a[j]); i++; j--;
        }
    }
    if (i<r) Sort(i,r);
    if (j>l) Sort(l,j);
}
void process(int c){
    int i=1,k,co;
    while (nny>0){
        res++;
        k=a[popy(1)].y;
        co=1;
        while (co<c && i<n && a[i].x<=k){
            co++;
            popy(idy[i]);
            i++;
        }
    }
}
void main(){
    cin >> n >> c >> k;
    int i,j=-1,h;
    for (i=0;i<n;i++){
      cin >> a[i].x;
      a[i].y=a[i].x+k;
      dau[i]=true;
    }
    Sort(0,n-1);
    for (i=0;i<n;i++) upy(i);
    process(c);
    cout << res;
}


Compiler output:
a.cc: In function 'void upx(int)':
a.cc:13:15: error: no match for 'operator==' (operand types are 'ta' and 'int')
   13 |     if (idx[i]==0){
      |         ~~~~~~^~~
      |              |  |
      |              ta int
In file included from /usr/include/c++/14/iosfwd:42,
                 from /usr/include/c++/14/ios:40,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/postypes.h:192:5: note: candidate: 'template<class _StateT> bool std::operator==(const fpos<_StateT>&, const fpos<_StateT>&)'
  192 |     operator==(const fpos<_StateT>& __lhs, const fpos<_StateT>& __rhs)
      |     ^~~~~~~~
/usr/include/c++/14/bits/postypes.h:192:5: note:   template argument deduction/substitution failed:
a.cc:13:17: note:   'ta' is not derived from 'const std::fpos<_StateT>'
   13 |     if (idx[i]==0){
      |                 ^
In file included from /usr/include/c++/14/string:43,
                 from /usr/include/c++/14/bits/locale_classes.h:40,
                 from /usr/include/c++/14/bits/ios_base.h:41,
                 from /usr/include/c++/14/ios:44:
/usr/include/c++/14/bits/allocator.h:235:5: note: candidate: 'template<class _T1, class _T2> bool std::operator==(const allocator<_CharT>&, const allocator<_T2>&)'
  235 |     operator==(const allocator<_T1>&, const allocator<_T2>&)
      |     ^~~~~~~~
/usr/include/c++/14/bits/allocator.h:235:5: note:   template argument deduction/substitution failed:
a.cc:13:17: note:   'ta' is not derived from 'const std::allocator<_CharT>'
   13 |     if (idx[i]==0){
      |                 ^
In file included from /usr/include/c++/14/string:48:
/usr/include/c++/14/bits/stl_iterator.h:441:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator==(const reverse_iterator<_Iterator>&, const reverse_iterator<_Iterator>&)'
  441 |     operator==(const reverse_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:441:5: note:   template argument deduction/substitution failed:
a.cc:13:17: note:   'ta' is not derived from 'const std::reverse_iterator<_Iterator>'
   13 |     if (idx[i]==0){
      |                 ^
/usr/include/c++/14/bits/stl_iterator.h:486:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator==(const reverse_iterator<_Iterator>&, const reverse_iterator<_IteratorR>&)'
  486 |     operator==(const reverse_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:486:5: note:   template argument deduction/substitution failed:
a.cc:13:17: note:   'ta' is not derived from 'const std::reverse_iterator<_Iterator>'
   13 |     if (idx[i]==0){
      |                 ^
/usr/include/c++/14/bits/stl_iterator.h:1667:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator==(const move_iterator<_IteratorL>&, const move_iterator<_IteratorR>&)'
 1667 |     operator==(const move_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1667:5: note:   template argument deduction/substitution failed:
a.cc:13:17: note:   'ta' is not derived from 'const std::move_iterator<_IteratorL>'
   13 |     if (idx[i]==0){
      |                 ^
/usr/include/c++/14/bits/stl_iterator.h:1737:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator==(const move_iterator<_IteratorL>&, const move_iterator<_IteratorL>&)'
 1737 |     operator==(const move_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1737:5: note:   template argument deduction/substitution failed:
a.cc:13:17: note:   'ta' is not derived from 'const std::move_iterator<_IteratorL>'
   13 |     if (idx[i]==0){
      |                 ^
In file included from /usr/include/c++/14/bits/stl_algobase.h:64,
                 from /usr/include/c++/14/string:51:
/usr/include/c++/14/bits/stl_pair.h:1033:5: note: candidate: 'template<class _T1, class _T2> constexpr bool std::operator==(const pair<_T1, _T2>&, const pair<_T1, _T2>&)'
 1033 |     operator==(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_pair.h:1033:5: note:   template argument deduction/substitution failed:
a.cc:13:17: note:   'ta' is not derived from 'const std::pair<_T1, _T2>'
   13 |     if (idx[i]==0){
      |                 ^
In file included from /usr/include/c++/14/bits/basic_string.h:47,
                 from /usr/include/c++/14/string:54:
/usr/include/c++/14/string_view:629:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator==(basic_string_view<_CharT, _Traits>, __type_identity_t<basic_string_view<_CharT, _Traits> >)'
  629 |     operator==(basic_string_view<_CharT, _Traits> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:629:5: note:   template argument deduction/substitution failed:
a.cc:13:17: note:   'ta' is not derived from 'std::basic_string_view<_CharT, _Traits>'
   13 |     if (idx[i]==0){
      |                 ^
/usr/include/c++/14/string_view:637:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator==(basic_string_view<_CharT, _Traits>, basic_string_view<_CharT, _Traits>)'
  637 |     operator==(basic_string_view<_CharT, _Traits> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:637:5: note:   template argument deduction/substitution failed:
a.cc:13:17: note:   'ta' is not derived from 'std::basic_string_view<_CharT, _Traits>'
   13 |     if (idx[i]==0){
      |                 ^
/usr/include/c++/14/string_view:644:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator==(__type_identity_t<basic_string_view<_CharT, _Traits> >, basic_string_view<_CharT, _Traits>)'
  644 |     operator==(__type_identity_t<basic_string_view<_CharT, _Traits>> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:644:5: note:   template argument deduction/substitution failed:
a.cc:13:17: note:   mismatched types 'std::basic_string_view<_CharT, _Traits>' and 'int'
   13 |     if (idx[i]==0){
      |                 ^
/usr/include/c++/14/bits/basic_string.h:3755:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator==(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3755 |     operator==(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3755:5: note:   template argument deduction/substitution failed:
a.cc:13:17: note:   'ta' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   13 |     if (idx[i]==0){
      |                 ^
/usr/include/c++/14/bits/basic_string.h:3772:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator==(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, const _CharT*)'
 3772 |     operator==(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3772:5: note:   template argument deduction/substitution failed:
a.cc:13:17: note:   'ta' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   13 |     if (idx[i]==0){
      |                 ^
/usr/include/c++/14/bits/basic_string.h:3819:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator==(const _CharT*, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3819 |     operator==(const _CharT* __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3819:5: note:   template argument deduction/substitution failed:
a.cc:13:17: note:   mismatched types 'const _CharT*' and 'ta'
   13 |     if (idx[i]==0){
      |                 ^
In file included from /usr/include/c++/14/bits/memory_resource.h:47,
                 from /usr/include/c++/14/string:68:
/usr/include/c++/14/tuple:2558:5: note: candidate: 'template<class ... _TElements, class ... _UElements> constexpr bool std::operator==(const tuple<_UTypes ...>&, const tuple<_Elements ...>&)'
 2558 |     operator==(const tuple<_TElements...>& __t,
      |     ^~~~~~~~
/usr/include/c++/14/tuple:2558:5: note:   template argument deduction/substitution failed:
a.cc:13:17: note:   'ta' is not derived from 'const std::tuple<_UTypes ...>'
   13 |     if (idx[i]==0){
      |                 ^
In file included from /usr/include/c++/14/bits/locale_facets.h:48,
                 from /usr/include/c++/14/bits/basic_ios.h:37,
                 from /usr/include/c++/14/ios:46:
/usr/include/c++/14/bits/streambuf_iterator.h:234:5: note: candidate: 'template<class _CharT, class _Traits> bool std::operator==(const istreambuf_iterator<_CharT, _Traits>&, const istreambuf_iterator<_CharT, _Traits>&)'
  234 |     operator==(const istreambuf_iterator<_CharT, _Traits>& __a,
      |     ^~~~~~~~
/usr/include/c++/14/bits/streambuf_iterator.h:234:5: note:   template argument deduction/substitution failed:
a.cc:13:17: note:   'ta' is not derived from 'const std::istreambuf_iterator<_CharT, _Traits>'
   13 |     if (idx[i]==0){
      |                 ^
In file included from /usr/include/c++/14/bits/ios_base.h:46:
/usr/include/c++/14/system_error:449:3: note: candidate: 'bool std::operator==(const error_code&, const error_code&)'
  449 |   operator==(const error_code& __lhs, const error_code& __rhs) noexcept
      |   ^~~~~~~~
/usr/include/c++/14/system_error:449:32: note:   no known conversion for argument 1 from 'ta' to 'const std::error_code&'
  449 |   operator==(const error_code& __lhs, const error_code& __rhs) noexcept
      |              ~~~~~~~~~~~~~~~~~~^~~~~
/usr/include/c++/14/system_error:465:3: note: candidate: 'bool std::operator==(const error_code&, const error_condition&)'
  465 |   operator==(const error_code& __lhs, const error_condition& __rhs) noexcept
      |   ^~~~~~~~
/usr/include/c++/14/system_error:465:32: note:   no known conversion for argument 1 from 'ta' to 'const std::error_code&'
  465 |   operator==(const error_code& __lhs, const error_condition& __rhs) noexcept
      |              ~~~~~