Language: C++

#include<bits/stdc++.h>
using namespace std;

#define N 5000 + 10
short f[N][N],n,ans;
char s[N];

int main(){
ios::sync_with_stdio(false);
cin>>n>>s;
for(int i=n-1;i>=0;i++)
for(int j=n-1;j>=0;j++){
if(s[i]==s[j])
f[i][j]=max(f[i][j],f[i+1][j+1]-1);
ans=max(ans,min(f[i][j],j-1);
}
cout<<ans;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:14:12: error: no matching function for call to 'max(short int&, int)'
   14 | f[i][j]=max(f[i][j],f[i+1][j+1]-1);
      |         ~~~^~~~~~~~~~~~~~~~~~~~~~~
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:257:5: note: candidate: 'template<class _Tp> constexpr const _Tp& std::max(const _Tp&, const _Tp&)'
  257 |     max(const _Tp& __a, const _Tp& __b)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:257:5: note:   template argument deduction/substitution failed:
a.cc:14:12: note:   deduced conflicting types for parameter 'const _Tp' ('short int' and 'int')
   14 | f[i][j]=max(f[i][j],f[i+1][j+1]-1);
      |         ~~~^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: note: candidate: 'template<class _Tp, class _Compare> constexpr const _Tp& std::max(const _Tp&, const _Tp&, _Compare)'
  303 |     max(const _Tp& __a, const _Tp& __b, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algobase.h:303:5: 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:5706:5: note: candidate: 'template<class _Tp> constexpr _Tp std::max(initializer_list<_Tp>)'
 5706 |     max(initializer_list<_Tp> __l)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5706:5: note:   candidate expects 1 argument, 2 provided
/usr/include/c++/14/bits/stl_algo.h:5716:5: note: candidate: 'template<class _Tp, class _Compare> constexpr _Tp std::max(initializer_list<_Tp>, _Compare)'
 5716 |     max(initializer_list<_Tp> __l, _Compare __comp)
      |     ^~~
/usr/include/c++/14/bits/stl_algo.h:5716:5: note:   template argument deduction/substitution failed:
a.cc:14:12: note:   mismatched types 'std::initializer_list<_Tp>' and 'short int'
   14 | f[i][j]=max(f[i][j],f[i+1][j+1]-1);
      |         ~~~^~~~~~~~~~~~~~~~~~~~~~~
a.cc:15:16: error: no matching function for call to 'min(short int&, int)'
   15 | ans=max(ans,min(f[i][j],j-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:15:16: note:   deduced conflicting types for parameter 'const _Tp' ('short int' and 'int')
   15 | ans=max(ans,min(f[i][j],j-1);
      |             ~~~^~~~~~~~~~~~~
/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:15:16: note:   mismatched types 'std::initializer_list<_Tp>' and 'short int'
   15 | ans=max(ans,min(f[i][j],j-1);
      |             ~~~^~~~~~~~~~~~~