Language: C++

#include <iostream>
#include <sstream>
#include <vector>
#include <cmath>
#include <ctime>
#include <cassert>
#include <iomanip>
#include <vector>
#include <cstdio>
#include <float.h>
#include <queue>
#include <set>
#include <map>
#include <fstream>
#include <cstdlib>
#include <string>
#include <cstring>
#include <algorithm>
#include <numeric>
#include <stack>
#include <functional>
 
using namespace std;
 
#define endl '\n'
#define MOD 1000000007
#define INF 1ll<<30
#define MAX 100010
#define eps 1e-11
#define bit_max 1ll<<32
#define _USE_MATH_DEFINES

long double dp[4000][4000];

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
   // freopen("input.txt","r",stdin);
  //  freopen("output.txt","w",stdout);
    string a;
    cin>>a;
    int ctr = 0;
    for(int i=0;i<a.length();i++)
    {
    	if(a[i]=='0')
    		ctr++;
    }	
    cout<<min(ctr,a.length()-ctr)*2;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:50:14: error: no matching function for call to 'min(int&, std::__cxx11::basic_string<char>::size_type)'
   50 |     cout<<min(ctr,a.length()-ctr)*2;
      |           ~~~^~~~~~~~~~~~~~~~~~~~
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:50:14: note:   deduced conflicting types for parameter 'const _Tp' ('int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'})
   50 |     cout<<min(ctr,a.length()-ctr)*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,
                 from a.cc:18:
/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:50:14: note:   mismatched types 'std::initializer_list<_Tp>' and 'int'
   50 |     cout<<min(ctr,a.length()-ctr)*2;
      |           ~~~^~~~~~~~~~~~~~~~~~~~