Language: C++

#include <iostream>
#include <string>
using namespace std;
int main(){
  int n,ln=0,rn=0;
  string ans[201];
  string s,l,r;
  l[0]="(", r[0]=")";
  cin>>n;
  cin>>s;

  for(int i=0;i<s.length();i++){
    if(s[i]=="(")ln++;
    else rn++;
  }

  ans=s;
  if(ln<rn){
    for(int i=0;i<ln-rn;i++)ans=l+ans;
  }else if(rn>ln){
    for(int i=0;i<rn-ln;i++)ans=ans+r;
  }

  cout<<ans<<endl;

  return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:8:8: error: invalid conversion from 'const char*' to '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} [-fpermissive]
    8 |   l[0]="(", r[0]=")";
      |        ^~~
      |        |
      |        const char*
a.cc:8:18: error: invalid conversion from 'const char*' to '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} [-fpermissive]
    8 |   l[0]="(", r[0]=")";
      |                  ^~~
      |                  |
      |                  const char*
a.cc:13:12: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
   13 |     if(s[i]=="(")ln++;
a.cc:17:6: error: incompatible types in assignment of 'std::string' {aka 'std::__cxx11::basic_string<char>'} to 'std::string [201]' {aka 'std::__cxx11::basic_string<char> [201]'}
   17 |   ans=s;
      |   ~~~^~
a.cc:19:34: error: no match for 'operator+' (operand types are 'std::string' {aka 'std::__cxx11::basic_string<char>'} and 'std::string [201]' {aka 'std::__cxx11::basic_string<char> [201]'})
   19 |     for(int i=0;i<ln-rn;i++)ans=l+ans;
      |                                 ~^~~~
      |                                 | |
      |                                 | std::string [201] {aka std::__cxx11::basic_string<char> [201]}
      |                                 std::string {aka std::__cxx11::basic_string<char>}
In file included from /usr/include/c++/14/string:48,
                 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_iterator.h:627:5: note: candidate: 'template<class _Iterator> constexpr std::reverse_iterator<_Iterator> std::operator+(typename reverse_iterator<_Iterator>::difference_type, const reverse_iterator<_Iterator>&)'
  627 |     operator+(typename reverse_iterator<_Iterator>::difference_type __n,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:627:5: note:   template argument deduction/substitution failed:
a.cc:19:35: note:   mismatched types 'const std::reverse_iterator<_Iterator>' and 'std::string [201]' {aka 'std::__cxx11::basic_string<char> [201]'}
   19 |     for(int i=0;i<ln-rn;i++)ans=l+ans;
      |                                   ^~~
/usr/include/c++/14/bits/stl_iterator.h:1798:5: note: candidate: 'template<class _Iterator> constexpr std::move_iterator<_IteratorL> std::operator+(typename move_iterator<_IteratorL>::difference_type, const move_iterator<_IteratorL>&)'
 1798 |     operator+(typename move_iterator<_Iterator>::difference_type __n,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1798:5: note:   template argument deduction/substitution failed:
a.cc:19:35: note:   mismatched types 'const std::move_iterator<_IteratorL>' and 'std::string [201]' {aka 'std::__cxx11::basic_string<char> [201]'}
   19 |     for(int i=0;i<ln-rn;i++)ans=l+ans;
      |                                   ^~~
In file included from /usr/include/c++/14/string:54:
/usr/include/c++/14/bits/basic_string.h:3598:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3598 |     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3598:5: note:   template argument deduction/substitution failed:
a.cc:19:35: note:   mismatched types 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'std::string [201]' {aka 'std::__cxx11::basic_string<char> [201]'}
   19 |     for(int i=0;i<ln-rn;i++)ans=l+ans;
      |                                   ^~~
/usr/include/c++/14/bits/basic_string.h:3616:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const _CharT*, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3616 |     operator+(const _CharT* __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3616:5: note:   template argument deduction/substitution failed:
a.cc:19:35: note:   mismatched types 'const _CharT*' and 'std::__cxx11::basic_string<char>'
   19 |     for(int i=0;i<ln-rn;i++)ans=l+ans;
      |                                   ^~~
/usr/include/c++/14/bits/basic_string.h:3635:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(_CharT, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3635 |     operator+(_CharT __lhs, const basic_string<_CharT,_Traits,_Alloc>& __rhs)
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3635:5: note:   template argument deduction/substitution failed:
a.cc:19:35: note:   mismatched types 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'std::string [201]' {aka 'std::__cxx11::basic_string<char> [201]'}
   19 |     for(int i=0;i<ln-rn;i++)ans=l+ans;
      |                                   ^~~
/usr/include/c++/14/bits/basic_string.h:3652:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, const _CharT*)'
 3652 |     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3652:5: note:   template argument deduction/substitution failed:
a.cc:19:35: note:   deduced conflicting types for parameter 'const _CharT' ('char' and 'std::string' {aka 'std::__cxx11::basic_string<char>'})
   19 |     for(int i=0;i<ln-rn;i++)ans=l+ans;
      |                                   ^~~
/usr/include/c++/14/bits/basic_string.h:3670:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, _CharT)'
 3670 |     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs, _CharT __rhs)
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3670:5: note:   template argument deduction/substitution failed:
a.cc:19:35: note:   deduced conflicting types for parameter '_CharT' ('char' and 'std::string*' {aka 'std::__cxx11::basic_string<char>*'})
   19 |     for(int i=0;i<ln-rn;i++)ans=l+ans;
      |                                   ^~~
/usr/include/c++/14/bits/basic_string.h:3682:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(__cxx11::basic_string<_CharT, _Traits, _Allocator>&&, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3682 |     operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3682:5: note:   template argument deduction/substitution failed:
a.cc:19:35: note:   mismatched types 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'std::string [201]' {aka 'std::__cxx11::basic_string<char> [201]'}
   19 |     for(int i=0;i<ln-rn;i++)ans=l+ans;
      |                                   ^~~
/usr/include/c++/14/bits/basic_string.h:3689:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, __cxx11::basic_string<_CharT, _Traits, _Allocator>&&)'
 3689 |     operator+(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3689:5: note:   template argument deduction/substitution failed:
a.cc:19:35: note:   mismatched types 'std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'std::string [201]' {aka 'std::__cxx11::basic_string<char> [201]'}
   19 |     for(int i=0;i<ln-rn;i++)ans=l+ans;
      |                                   ^~~
/usr/include/c++/14/bits/basic_string.h:3696:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(__cxx11::basic_string<_CharT, _Traits, _Allocator>&&, __cxx11::basic_string<_CharT, _Traits, _Allocator>&&)'
 3696 |     operator+(basic_string<_CharT, _Traits, _Alloc>&& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3696:5: note:   template argument deduction/substitution failed:
a.cc:19:35: note:   mismatched types 'std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'std::string [201]' {aka 'std::__cxx11::basic_string<char> [201]'}
   19 |     for(int i=0;i<ln-rn;i++)ans=l+ans;
      |                                   ^~~
/usr/include/c++/14/bits/basic_string.h:3719:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(const _CharT*, __cxx11::basic_string<_CharT, _Traits, _Allocator>&&)'
 3719 |     operator+(const _CharT* __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3719:5: note:   template argument deduction/substitution failed:
a.cc:19:35: note:   mismatched types 'const _CharT*' and 'std::__cxx11::basic_string<char>'
   19 |     for(int i=0;i<ln-rn;i++)ans=l+ans;
      |                                   ^~~
/usr/include/c++/14/bits/basic_string.h:3726:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> std::__cxx11::basic_string<_CharT, _Traits, _Allocator> std::operator+(_CharT, __cxx11::basic_string<_CharT, _Traits, _Allocator>&&)'
 3726 |     operator+(_CharT __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3726:5: note:   template argument deduction/substitution failed:
a.cc:19:35: note:   mismatched types 'std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'std::string [201]' {aka 'std::__cxx11::basic_string<char> [201]'}
   19 |     for(int i=0;i<ln-rn;i++)a