Language: C++

#include <bits/stdc++.h>
#define ll long long
using namespace std;
 
ll gcd(ll a, ll b){
  if(b == 0){
    return a;
  }
  else{
    return gcd(b,(a%b));
  }
}
ll lcm(ll a,ll b){
  return a/gcd(a,b)*b;
}

int main() {
  int n,k;
  cin>>n>>k;
  if(n==0){
    cout<<0<<endl;
    return 0;
  }
  int vec[n][3];
  for(int i=0;i<n;i++){
    cin>>vec[n][1]>>vec[n][2]>>vec[n][0];
  }
  sort(vec,vec+n);
  double t=0;
  for(int i=0;i<n-1;i++){
    for(int j=i+1;j<n;j++){
      if(vec[i][0]==vec[0][0]&&vec[j][0]==vec[n-1][0]){
        t=max(sqrt(pow(vec[i][2]-vec[j][2],2)+pow(vec[i][1]-vec[j][1],2)),t);
      }
    }
  }
  cout<<vec[0][0]*t*(vec[1][0]/(vec[0][0]+vec[1][0])<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:37:53: error: invalid operands of types 'int' and '<unresolved overloaded function type>' to binary 'operator<<'
   37 |   cout<<vec[0][0]*t*(vec[1][0]/(vec[0][0]+vec[1][0])<<endl;
      |                      ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~
a.cc:37:59: error: expected ')' before ';' token
   37 |   cout<<vec[0][0]*t*(vec[1][0]/(vec[0][0]+vec[1][0])<<endl;
      |                     ~                                     ^
      |                                                           )
In file included from /usr/include/c++/14/algorithm:61,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algo.h: In instantiation of 'void std::__insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = int (*)[3]; _Compare = __gnu_cxx::__ops::_Iter_less_iter]':
/usr/include/c++/14/bits/stl_algo.h:1817:25:   required from 'void std::__final_insertion_sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = int (*)[3]; _Compare = __gnu_cxx::__ops::_Iter_less_iter]'
 1817 |           std::__insertion_sort(__first, __first + int(_S_threshold), __comp);
      |           ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algo.h:1908:31:   required from 'void std::__sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = int (*)[3]; _Compare = __gnu_cxx::__ops::_Iter_less_iter]'
 1908 |           std::__final_insertion_sort(__first, __last, __comp);
      |           ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algo.h:4772:18:   required from 'void std::sort(_RAIter, _RAIter) [with _RAIter = int (*)[3]]'
 4772 |       std::__sort(__first, __last, __gnu_cxx::__ops::__iter_less_iter());
      |       ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
a.cc:28:7:   required from here
   28 |   sort(vec,vec+n);
      |   ~~~~^~~~~~~~~~~
/usr/include/c++/14/bits/stl_algo.h:1780:17: error: array must be initialized with a brace-enclosed initializer
 1780 |                 __val = _GLIBCXX_MOVE(*__i);
      |                 ^~~~~
/usr/include/c++/14/bits/stl_algo.h:1782:24: error: invalid array assignment
 1782 |               *__first = _GLIBCXX_MOVE(__val);
      |                        ^
In file included from /usr/include/c++/14/bits/stl_algo.h:61:
/usr/include/c++/14/bits/stl_heap.h: In instantiation of 'void std::__make_heap(_RandomAccessIterator, _RandomAccessIterator, _Compare&) [with _RandomAccessIterator = int (*)[3]; _Compare = __gnu_cxx::__ops::_Iter_less_iter]':
/usr/include/c++/14/bits/stl_algo.h:1593:23:   required from 'void std::__heap_select(_RandomAccessIterator, _RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = int (*)[3]; _Compare = __gnu_cxx::__ops::_Iter_less_iter]'
 1593 |       std::__make_heap(__first, __middle, __comp);
      |       ~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algo.h:1868:25:   required from 'void std::__partial_sort(_RandomAccessIterator, _RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = int (*)[3]; _Compare = __gnu_cxx::__ops::_Iter_less_iter]'
 1868 |       std::__heap_select(__first, __middle, __last, __comp);
      |       ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algo.h:1884:27:   required from 'void std::__introsort_loop(_RandomAccessIterator, _RandomAccessIterator, _Size, _Compare) [with _RandomAccessIterator = int (*)[3]; _Size = long int; _Compare = __gnu_cxx::__ops::_Iter_less_iter]'
 1884 |               std::__partial_sort(__first, __last, __last, __comp);
      |               ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algo.h:1905:25:   required from 'void std::__sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = int (*)[3]; _Compare = __gnu_cxx::__ops::_Iter_less_iter]'
 1905 |           std::__introsort_loop(__first, __last,
      |           ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
 1906 |                                 std::__lg(__last - __first) * 2,
      |                                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 1907 |                                 __comp);
      |                                 ~~~~~~~
/usr/include/c++/14/bits/stl_algo.h:4772:18:   required from 'void std::sort(_RAIter, _RAIter) [with _RAIter = int (*)[3]]'
 4772 |       std::__sort(__first, __last, __gnu_cxx::__ops::__iter_less_iter());
      |       ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
a.cc:28:7:   required from here
   28 |   sort(vec,vec+n);
      |   ~~~~^~~~~~~~~~~
/usr/include/c++/14/bits/stl_heap.h:355:22: error: array must be initialized with a brace-enclosed initializer
  355 |           _ValueType __value = _GLIBCXX_MOVE(*(__first + __parent));
      |                      ^~~~~~~
/usr/include/c++/14/bits/stl_heap.h: In instantiation of 'void std::__pop_heap(_RandomAccessIterator, _RandomAccessIterator, _RandomAccessIterator, _Compare&) [with _RandomAccessIterator = int (*)[3]; _Compare = __gnu_cxx::__ops::_Iter_less_iter]':
/usr/include/c++/14/bits/stl_algo.h:1596:19:   required from 'void std::__heap_select(_RandomAccessIterator, _RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = int (*)[3]; _Compare = __gnu_cxx::__ops::_Iter_less_iter]'
 1596 |           std::__pop_heap(__first, __middle, __i, __comp);
      |           ~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algo.h:1868:25:   required from 'void std::__partial_sort(_RandomAccessIterator, _RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = int (*)[3]; _Compare = __gnu_cxx::__ops::_Iter_less_iter]'
 1868 |       std::__heap_select(__first, __middle, __last, __comp);
      |       ~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algo.h:1884:27:   required from 'void std::__introsort_loop(_RandomAccessIterator, _RandomAccessIterator, _Size, _Compare) [with _RandomAccessIterator = int (*)[3]; _Size = long int; _Compare = __gnu_cxx::__ops::_Iter_less_iter]'
 1884 |               std::__partial_sort(__first, __last, __last, __comp);
      |               ~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algo.h:1905:25:   required from 'void std::__sort(_RandomAccessIterator, _RandomAccessIterator, _Compare) [with _RandomAccessIterator = int (*)[3]; _Compare = __gnu_cxx::__ops::_Iter_less_iter]'
 1905 |           std::__introsort_loop(__first, __last,
      |           ~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~~
 1906 |                                 std::__lg(__last - __first) * 2,
      |                                 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 1907 |                                 __comp);
      |                                 ~~~~~~~
/usr/include/c++/14/bits/stl_algo.h:4772:18:   required from 'void std::sort(_RAIter, _RAIter) [with _RAIter = int (*)[3]]'
 4772 |       std::__sort(__first, __last, __gnu_cxx::__ops::__iter_less_iter());
      |       ~~~~~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
a.cc:28:7:   required from here
   28 |   sort(vec,vec+n);
      |   ~~~~^~~~~~~~~~~
/usr/include/c++/14/bits/stl_heap.h:262:18: error: array must be initialized with a brace-enclosed initializer
  262 |       _ValueType __value = _GLIBCXX_MOVE(*__result);
      |                  ^~~~~~~
/usr/include/c++/14/bits/stl_heap.h:263:17: error: invalid array assignment
  263 |       *__result = _GLIBCXX_MOVE(*__first);
      |                 ^