Language: C++

#include<iostream>
#include<vector>
#include<queue>
#include<stack>
#include<list>
#include<string>
#include<cmath>
#include<algorithm>
#include<bitset>
#include<map>
#include<functional>
#include<set>

using namespace std;

#define FOR(i,r,n) for(ll i = (ll)(r); i < (ll)(n); i++)
#define RFOR(i,r,n) for(ll i=(ll)(n-1);i>=r;i--)
#define ALL(x) x.begin(),x.end()
#define RALL(x) x.rbegin(),x.rend()
#define INF 9223372036854775807
#define MOD 1000000007
typedef long long int ll;
typedef long double ld;
typedef vector<ll> vll;
typedef vector<string> vs;
typedef pair<ll, ll> pll;

ll n = 0, m = 0, ans = 0, sum = 0, cnt = 0, temp = 0;
string s;
bool flag;

//-------------------------------------------------------------------------------

#define MAX 10000

int main(void) {
  cin >> s;

  FOR(i, 0, s.length() - 1) {
	ans = s[i] != s[i + 1] ? max(ans, max(i + 1, s.length() - i - 1)) : ans;
  }

  cout << ans << endl;

  return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:40:46: error: no matching function for call to 'max(ll, long long unsigned int)'
   40 |         ans = s[i] != s[i + 1] ? max(ans, max(i + 1, s.length() - i - 1)) : ans;
      |                                           ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
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: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:40:46: note:   deduced conflicting types for parameter 'const _Tp' ('long long int' and 'long long unsigned int')
   40 |         ans = s[i] != s[i + 1] ? max(ans, max(i + 1, s.length() - i - 1)) : ans;
      |                                           ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
/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,
                 from a.cc:8:
/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:40:46: note:   mismatched types 'std::initializer_list<_Tp>' and 'long long int'
   40 |         ans = s[i] != s[i + 1] ? max(ans, max(i + 1, s.length() - i - 1)) : ans;
      |                                           ~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~