Language: C++

#include<iostream>
#include<string>
#include<vector>
#include<algorithm>
using namespace std;

int main(){
  int N,K,ans=0;
  string S;
  cin>>N>>K>>S;
  vector<int> Z;
  
  int AAA=0,BBB=0;
  for(int i=0; i<N; ++i){
    if(S.at(i)=='1'){
      BBB ++;
      if(AAA>0){
        Z.push_back(AAA); 
        AAA=0;
      }
    }
    else{
      AAA ++;
      if(BBB>0){
        Z.push_back(BBB); 
        BBB=0;
      }
    }
  }
  
  vector<int> ZZ;
  int g=0;
  for(int i=0; i<Z.size(); ++i){
    g+=Z[i];
    ZZ.push_back(g);
  }
  
  for(int i=0; i<100000; ++i) ZZ.push_back(0);
  
  
  
  if(S.at(0)=='0'){
    ans=max(0,ZZ[2*K]);
    for(int i=0; i<max(Z.size()-2*K,1); ++i){
      if(i%2==0) ans=max(ans,ZZ[i+2*K+1]-ZZ[i]);
    }
  }
  else{
    ans=max(ans,ZZ[2*K+1]-ZZ[0]);
    for(int i=0; i<max(Z.size()-2*K,2); ++i){
      if(i%2==1) ans=max(ans,ZZ[i+2*K+1]-ZZ[i]);
    }
  }
  
  cout<<ans<<endl;
}



Compiler output:
a.cc: In function 'int main()':
a.cc:44:23: error: no matching function for call to 'max(std::vector<int>::size_type, int)'
   44 |     for(int i=0; i<max(Z.size()-2*K,1); ++i){
      |                    ~~~^~~~~~~~~~~~~~~~
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:44:23: note:   deduced conflicting types for parameter 'const _Tp' ('long unsigned int' and 'int')
   44 |     for(int i=0; i<max(Z.size()-2*K,1); ++i){
      |                    ~~~^~~~~~~~~~~~~~~~
/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:4:
/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:44:23: note:   mismatched types 'std::initializer_list<_Tp>' and 'long unsigned int'
   44 |     for(int i=0; i<max(Z.size()-2*K,1); ++i){
      |                    ~~~^~~~~~~~~~~~~~~~
a.cc:50:23: error: no matching function for call to 'max(std::vector<int>::size_type, int)'
   50 |     for(int i=0; i<max(Z.size()-2*K,2); ++i){
      |                    ~~~^~~~~~~~~~~~~~~~
/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:50:23: note:   deduced conflicting types for parameter 'const _Tp' ('long unsigned int' and 'int')
   50 |     for(int i=0; i<max(Z.size()-2*K,2); ++i){
      |                    ~~~^~~~~~~~~~~~~~~~
/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
/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:50:23: note:   mismatched types 'std::initializer_list<_Tp>' and 'long unsigned int'
   50 |     for(int i=0; i<max(Z.size()-2*K,2); ++i){
      |                    ~~~^~~~~~~~~~~~~~~~