Language: C++

#include <iostream>
#include <vector>
#include <queue>

int abs(int x){
  if(x>0) return x;
  else return -x;
}

int intmax(a,b) {
  if(a>b) return a;
  else return b;
}

int find_next(std::vector<int> A, int sum, int start, int num, int mx, int mn){
  if(num == 3) {
   return max - min;
   }
  int max = mx, min = mn;

  int i = start;
  int subsum = 0;
  while(subsum < sum / 4) {
    subsum += A[ i ];
    i++;
  }
  if(num == 1) {max = subsum; min = subsum;}
  int max_before = max;
  int min_before = min;
  if(subsum > max_before) max = sumsum;
  if(subsum < min_before) min = subsum;
  int left =  find_next(A, sum, i, num+1, max, min);
  subsm += A[i];
  max = max_before;
  min = min_before;
  if(subsum > max_before) max = sumsum;
  if(subsum < min_before) min = subsum;
  int right =  find_next(A, sum, i+1, num+1, max, min);
  return intmax(left, right);
}

int main(void){
  int N;
  std::cin >> N;
  std::vector<int> A(N);
  for(int i = 0;i < N; i++) {
    std::cin>A[i];
  }
  int sum = 0;
  for (int i = 0; i < N; i++) {
    sum += A[i];
  }
  std::cout << find_next(A, 
  

Compiler output:
a.cc:10:12: error: 'a' was not declared in this scope
   10 | int intmax(a,b) {
      |            ^
a.cc:10:14: error: 'b' was not declared in this scope
   10 | int intmax(a,b) {
      |              ^
a.cc:10:15: error: expression list treated as compound expression in initializer [-fpermissive]
   10 | int intmax(a,b) {
      |               ^
a.cc: In function 'int find_next(std::vector<int>, int, int, int, int, int)':
a.cc:17:11: error: 'max' was not declared in this scope; did you mean 'std::max'?
   17 |    return max - min;
      |           ^~~
      |           std::max
In file included from /usr/include/c++/14/string:51,
                 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,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: 'std::max' declared here
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
a.cc:17:17: error: 'min' was not declared in this scope; did you mean 'std::min'?
   17 |    return max - min;
      |                 ^~~
      |                 std::min
/usr/include/c++/14/bits/stl_algobase.h:281:5: note: 'std::min' declared here
  281 |     min(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
a.cc:30:33: error: 'sumsum' was not declared in this scope; did you mean 'subsum'?
   30 |   if(subsum > max_before) max = sumsum;
      |                                 ^~~~~~
      |                                 subsum
a.cc:33:3: error: 'subsm' was not declared in this scope; did you mean 'subsum'?
   33 |   subsm += A[i];
      |   ^~~~~
      |   subsum
a.cc:36:33: error: 'sumsum' was not declared in this scope; did you mean 'subsum'?
   36 |   if(subsum > max_before) max = sumsum;
      |                                 ^~~~~~
      |                                 subsum
a.cc:39:16: error: 'intmax' cannot be used as a function
   39 |   return intmax(left, right);
      |          ~~~~~~^~~~~~~~~~~~~
a.cc: In function 'int main()':
a.cc:47:13: error: no match for 'operator>' (operand types are 'std::istream' {aka 'std::basic_istream<char>'} and '__gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type' {aka 'int'})
   47 |     std::cin>A[i];
a.cc:47:13: note: candidate: 'operator>(int, __gnu_cxx::__alloc_traits<std::allocator<int>, int>::value_type {aka int})' (built-in)
a.cc:47:13: note:   no known conversion for argument 1 from 'std::istream' {aka 'std::basic_istream<char>'} to 'int'
In file included from /usr/include/c++/14/string:48:
/usr/include/c++/14/bits/stl_iterator.h:462:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator>(const reverse_iterator<_Iterator>&, const reverse_iterator<_Iterator>&)'
  462 |     operator>(const reverse_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:462:5: note:   template argument deduction/substitution failed:
a.cc:47:17: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'const std::reverse_iterator<_Iterator>'
   47 |     std::cin>A[i];
      |                 ^
/usr/include/c++/14/bits/stl_iterator.h:507:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator>(const reverse_iterator<_Iterator>&, const reverse_iterator<_IteratorR>&)'
  507 |     operator>(const reverse_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:507:5: note:   template argument deduction/substitution failed:
a.cc:47:17: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'const std::reverse_iterator<_Iterator>'
   47 |     std::cin>A[i];
      |                 ^
/usr/include/c++/14/bits/stl_iterator.h:1714:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator>(const move_iterator<_IteratorL>&, const move_iterator<_IteratorR>&)'
 1714 |     operator>(const move_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1714:5: note:   template argument deduction/substitution failed:
a.cc:47:17: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'const std::move_iterator<_IteratorL>'
   47 |     std::cin>A[i];
      |                 ^
/usr/include/c++/14/bits/stl_iterator.h:1774:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator>(const move_iterator<_IteratorL>&, const move_iterator<_IteratorL>&)'
 1774 |     operator>(const move_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1774:5: note:   template argument deduction/substitution failed:
a.cc:47:17: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'const std::move_iterator<_IteratorL>'
   47 |     std::cin>A[i];
      |                 ^
In file included from /usr/include/c++/14/bits/stl_algobase.h:64:
/usr/include/c++/14/bits/stl_pair.h:1058:5: note: candidate: 'template<class _T1, class _T2> constexpr bool std::operator>(const pair<_T1, _T2>&, const pair<_T1, _T2>&)'
 1058 |     operator>(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_pair.h:1058:5: note:   template argument deduction/substitution failed:
a.cc:47:17: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'const std::pair<_T1, _T2>'
   47 |     std::cin>A[i];
      |                 ^
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:695:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator>(basic_string_view<_CharT, _Traits>, basic_string_view<_CharT, _Traits>)'
  695 |     operator> (basic_string_view<_CharT, _Traits> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:695:5: note:   template argument deduction/substitution failed:
a.cc:47:17: note:   'std::basic_istream<char>' is not derived from 'std::basic_string_view<_CharT, _Traits>'
   47 |     std::cin>A[i];
      |                 ^
/usr/include/c++/14/string_view:702:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator>(basic_string_view<_CharT, _Traits>, __type_identity_t<basic_string_view<_CharT, _Traits> >)'
  702 |     operator> (basic_string_view<_CharT, _Traits> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:702:5: note:   template argument deduction/substitution failed:
a.cc:47:17: note:   'std::basic_istream<char>' is not derived from 'std::basic_string_view<_CharT, _Traits>'
   47 |     std::cin>A[i];
      |                 ^
/usr/include/c++/14/string_view:710:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator>(__type_identity_t<basic_string_view<_CharT, _Traits> >, basic_string_view<_CharT, _Traits>)'
  710 |     operator> (__type_identity_t<basic_string_view<_CharT, _Traits>> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:710:5: note:   template argument deduction/substitution failed:
a.cc:47:17: note:   mismatched types 'std::basic_string_view<_CharT, _Traits>' and 'int'
   47 |     std::cin>A[i];
      |                 ^
/usr/include/c++/14/bits/basic_string.h:3915:5: 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>&)'
 3915 |     operator>(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3915:5: note:   template argument deduction/substitution failed:
a.cc:47:17: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   47 |     std::cin>A[i];
      |                 ^
/usr/include/c++/14/bits/basic_string.h:3929:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator>(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, const _CharT*)'
 3929 |     operator>(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3929:5: note:   template argument deduction/substitution failed:
a.cc:47:17: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   47 |     std::cin>A[i];
      |                 ^
/usr/include/c++/14/bits/basic_string.h:3942:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator>(const _CharT*, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3942 |     operator>(const _CharT* __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3942:5: note:   template argument deduction/substitution failed:
a.cc:47:17: note:   mismatched types 'const _CharT*' and 'std::basic_istream<char>'
   47 |     std::cin>A[i];
      |                 ^
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:2619:5: note: candidate: 'template<class ... _TElements, class ... _UElements> constexpr bool std::operator>(const tuple<_UTypes ...>&, const tuple<_Elements ...>&)'
 2619 |     operator>(const tuple<_TElements...>& __t,
      |     ^~~~~~~~
/usr/include/c++/14/tuple:2619:5: note:   template argument deduction/substitution failed:
a.cc:47:17: note:   'std::istream' {aka 'std::basic_istream<char>'} is not derived from 'const std::tuple<_UTypes ...>'
   47 |     std::cin>A[i];
      |                 ^
In file included from /usr/include/c++/14/vector:66,
                 from a.cc:2:
/usr/include/c++/14/bits/stl_vector.h:2102:5: note: candidate: 'template<class _Tp, class _Alloc> bool std::operator>(const vector<_Tp, _Alloc>&, const vector<_Tp, _Alloc>&)'
 2102 |     operator>(const vector<_Tp, _Alloc>& __x, const vector<_Tp, _Alloc>& __y)
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_vector.h