Language: C++

#include <iostream>
#include <algorithm>
using namespace std;
int main(){
    int h,w;
    int cand1=1e9,cand2=1e9;
    cin>> h >> w;
    for (int i=1; i<h; i++){
        long long a[3];
        long long b[3];
        a[0]=i*w;
        b[0]=i*w;
        a[1]=(h-i)*(w/2);
        b[1]=((h-i)/2)*w;
        a[2]=h*w-a[0]-a[1];
        b[2]=h*w-b[0]-b[1];
        sort(a,a+3);
        sort(b,b+3);
        cand1=min(cand1,a[2]-a[0]);
        cand2=min(cand2,b[2]-b[0]);
    }
    for (int i=1; i<w; i++){
        long long a[3];
        long long b[3];
        a[0]=i*h;
        b[0]=i*h;
        a[1]=(w-i)*(h/2);
        b[1]=((w-i)/2)*h;
        a[2]=h*w-a[0]-a[1];
        b[2]=h*w-b[0]-b[1];
        sort(a,a+3);
        sort(b,b+3);
        cand1=min(cand1,a[2]-a[0]);
        cand2=min(cand2,b[2]-b[0]);
    }
    cout << min(cand1,cand2) <<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:19:18: error: no matching function for call to 'min(int&, long long int)'
   19 |         cand1=min(cand1,a[2]-a[0]);
      |               ~~~^~~~~~~~~~~~~~~~~
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:233:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::min(const _Tp&, const _Tp&)'
  233 |     min(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:233:5: note:   template argument deduction/substitution failed:
a.cc:19:18: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
   19 |         cand1=min(cand1,a[2]-a[0]);
      |               ~~~^~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::min(const _Tp&, const _Tp&, _Compare)'
  281 |     min(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note:   candidate expects 3 arguments, 2 provided
In file included from /usr/include/c++/14/algorithm:61,
                 from a.cc:2:
/usr/include/c++/14/bits/stl_algo.h:5686:5: note: candidate: 'template<class _Tp> constexpr _Tp std::min(initializer_list<_Tp>)'
 5686 |     min(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5686:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5696:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::min(initializer_list<_Tp>, _Compare)'
 5696 |     min(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5696:5: note:   template argument deduction/substitution failed:
a.cc:19:18: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   19 |         cand1=min(cand1,a[2]-a[0]);
      |               ~~~^~~~~~~~~~~~~~~~~
a.cc:20:18: error: no matching function for call to 'min(int&, long long int)'
   20 |         cand2=min(cand2,b[2]-b[0]);
      |               ~~~^~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:233:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::min(const _Tp&, const _Tp&)'
  233 |     min(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:233:5: note:   template argument deduction/substitution failed:
a.cc:20:18: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
   20 |         cand2=min(cand2,b[2]-b[0]);
      |               ~~~^~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::min(const _Tp&, const _Tp&, _Compare)'
  281 |     min(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note:   candidate expects 3 arguments, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5686:5: note: candidate: 'template<class _Tp> constexpr _Tp std::min(initializer_list<_Tp>)'
 5686 |     min(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5686:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5696:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::min(initializer_list<_Tp>, _Compare)'
 5696 |     min(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5696:5: note:   template argument deduction/substitution failed:
a.cc:20:18: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   20 |         cand2=min(cand2,b[2]-b[0]);
      |               ~~~^~~~~~~~~~~~~~~~~
a.cc:33:18: error: no matching function for call to 'min(int&, long long int)'
   33 |         cand1=min(cand1,a[2]-a[0]);
      |               ~~~^~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:233:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::min(const _Tp&, const _Tp&)'
  233 |     min(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:233:5: note:   template argument deduction/substitution failed:
a.cc:33:18: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
   33 |         cand1=min(cand1,a[2]-a[0]);
      |               ~~~^~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::min(const _Tp&, const _Tp&, _Compare)'
  281 |     min(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note:   candidate expects 3 arguments, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5686:5: note: candidate: 'template<class _Tp> constexpr _Tp std::min(initializer_list<_Tp>)'
 5686 |     min(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5686:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5696:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::min(initializer_list<_Tp>, _Compare)'
 5696 |     min(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5696:5: note:   template argument deduction/substitution failed:
a.cc:33:18: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   33 |         cand1=min(cand1,a[2]-a[0]);
      |               ~~~^~~~~~~~~~~~~~~~~
a.cc:34:18: error: no matching function for call to 'min(int&, long long int)'
   34 |         cand2=min(cand2,b[2]-b[0]);
      |               ~~~^~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:233:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::min(const _Tp&, const _Tp&)'
  233 |     min(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:233:5: note:   template argument deduction/substitution failed:
a.cc:34:18: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
   34 |         cand2=min(cand2,b[2]-b[0]);
      |               ~~~^~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::min(const _Tp&, const _Tp&, _Compare)'
  281 |     min(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:281:5: note:   candidate expects 3 arguments, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5686:5: note: candidate: 'template<class _Tp> constexpr _Tp std::min(initializer_list<_Tp>)'
 5686 |     min(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5686:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5696:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::min(initializer_list<_Tp>, _Compare)'
 5696 |     min(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5696:5: note:   template argument deduction/substitution failed:
a.cc:34:18: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   34 |         cand2=min(cand2,b[2]-b[0]);
      |               ~~~^~~~~~~~~~~~~~~~~