Language: C++

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
int main(){
  ll h,w; cin>>h >>w;
  int ans=INT_MAX;
  for(int i=1;i<h;i++){
    ll sa=i*w;
    ll s=h*w-sa;
    ans=min(ans,max(sa,s/2)-min(sa,s/2));
  }
  for(int i=1;i<w;i++){
    ll sa=i*h;
    ll s=h*w-sa;
    ans=min(ans,max(sa,s/2)-min(sa,s/2));
  }
  cout<<ans<<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:10:12: error: no matching function for call to 'min(int&, long long int)'
   10 |     ans=min(ans,max(sa,s/2)-min(sa,s/2));
      |         ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
In file included from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:51,
                 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:10:12: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
   10 |     ans=min(ans,max(sa,s/2)-min(sa,s/2));
      |         ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/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:
/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:10:12: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   10 |     ans=min(ans,max(sa,s/2)-min(sa,s/2));
      |         ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
a.cc:15:12: error: no matching function for call to 'min(int&, long long int)'
   15 |     ans=min(ans,max(sa,s/2)-min(sa,s/2));
      |         ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/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:15:12: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'long long int')
   15 |     ans=min(ans,max(sa,s/2)-min(sa,s/2));
      |         ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/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:15:12: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   15 |     ans=min(ans,max(sa,s/2)-min(sa,s/2));
      |         ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~