Language: C++

#include<iostream>
#include<algorithm>

using namespace std;

int main(){
  int a,b,c,k,i,j;
  
  cin>>a>>b>>c>>k;
  
  if(a==b&&b==c){
    for(i=0;i<k+2;i++)
      j=j*2;
    cout<<j<<endl;
    return 0;
  else{
    for(i=0;i<k;i++)
      j=j*2;
    cout<<j*max([a,b,c])+a+b+c-max([a,b,c])<<endl;
    return 0;
  }
  
}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:3: error: expected '}' before 'else'
   16 |   else{
      |   ^~~~
a.cc:11:17: note: to match this '{'
   11 |   if(a==b&&b==c){
      |                 ^
a.cc: In lambda function:
a.cc:19:24: error: expected '{' before ')' token
   19 |     cout<<j*max([a,b,c])+a+b+c-max([a,b,c])<<endl;
      |                        ^
a.cc: In function 'int main()':
a.cc:19:16: error: no matching function for call to 'max(main()::<lambda()>)'
   19 |     cout<<j*max([a,b,c])+a+b+c-max([a,b,c])<<endl;
      |             ~~~^~~~~~~~~
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:   candidate expects 2 arguments, 1 provided
/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, 1 provided
In file included from /usr/include/c++/14/algorithm:61,
                 from a.cc:2:
/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:   template argument deduction/substitution failed:
a.cc:19:16: note:   'main()::<lambda()>' is not derived from 'std::initializer_list<_Tp>'
   19 |     cout<<j*max([a,b,c])+a+b+c-max([a,b,c])<<endl;
      |             ~~~^~~~~~~~~
/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:   candidate expects 2 arguments, 1 provided
a.cc: In lambda function:
a.cc:19:43: error: expected '{' before ')' token
   19 |     cout<<j*max([a,b,c])+a+b+c-max([a,b,c])<<endl;
      |                                           ^
a.cc: In function 'int main()':
a.cc:19:35: error: no matching function for call to 'max(main()::<lambda()>)'
   19 |     cout<<j*max([a,b,c])+a+b+c-max([a,b,c])<<endl;
      |                                ~~~^~~~~~~~~
/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:   candidate expects 2 arguments, 1 provided
/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, 1 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:   template argument deduction/substitution failed:
a.cc:19:35: note:   'main()::<lambda()>' is not derived from 'std::initializer_list<_Tp>'
   19 |     cout<<j*max([a,b,c])+a+b+c-max([a,b,c])<<endl;
      |                                ~~~^~~~~~~~~
/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:   candidate expects 2 arguments, 1 provided