Language: C++

#include <bits/stdc++.h>
using namespace std;

int main() {
  int L =0;
  vector<bool>S;
  for(int i = 0 ;i < 3;i++)cin >> S[i];
  for(int i = 0 ;i < 3;i++){
    if(S[i] == 'R')L++;
  }
  if(S[1] == 'S')L = 1;
  cout << L <<endl;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:7:32: error: no match for 'operator>>' (operand types are 'std::istream' {aka 'std::basic_istream<char>'} and 'std::vector<bool>::reference')
    7 |   for(int i = 0 ;i < 3;i++)cin >> S[i];
      |                            ~~~ ^~ ~~~~
      |                            |         |
      |                            |         std::vector<bool>::reference
      |                            std::istream {aka std::basic_istream<char>}
In file included from /usr/include/c++/14/sstream:40,
                 from /usr/include/c++/14/complex:45,
                 from /usr/include/c++/14/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:127,
                 from a.cc:1:
/usr/include/c++/14/istream:170:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(bool&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  170 |       operator>>(bool& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:170:7: note:   conversion of argument 1 would be ill-formed:
a.cc:7:38: error: cannot bind non-const lvalue reference of type 'bool&' to an rvalue of type 'bool'
    7 |   for(int i = 0 ;i < 3;i++)cin >> S[i];
      |                                   ~~~^
In file included from /usr/include/c++/14/vector:67,
                 from /usr/include/c++/14/functional:64,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:53:
/usr/include/c++/14/bits/stl_bvector.h:99:5: note:   after user-defined conversion: 'std::_Bit_reference::operator bool() const'
   99 |     operator bool() const _GLIBCXX_NOEXCEPT
      |     ^~~~~~~~
/usr/include/c++/14/istream:174:7: note: candidate: 'std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(short int&) [with _CharT = char; _Traits = std::char_traits<char>]' (near match)
  174 |       operator>>(short& __n);
      |       ^~~~~~~~
/usr/include/c++/14/istream:174:7: note:   conversion of argument 1 would be ill-formed:
a.cc:7:38: error: cannot bind non-const lvalue reference of type 'short int&' to a value of type 'bool'
    7 |   for(int i = 0 ;i < 3;i++)cin >> S[i];
      |                                   ~~~^
/usr/include/c++/14/bits/stl_bvector.h:99:5: note:   after user-defined conversion: 'std::_Bit_reference::operator bool() const'
   99 |     operator bool() const _GLIBCXX_NOEXCEPT
      |     ^~~~~~~~
/usr/include/c++/14/istream:177:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(short unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  177 |       operator>>(unsigned short& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:177:7: note:   conversion of argument 1 would be ill-formed:
a.cc:7:38: error: cannot bind non-const lvalue reference of type 'short unsigned int&' to a value of type 'bool'
    7 |   for(int i = 0 ;i < 3;i++)cin >> S[i];
      |                                   ~~~^
/usr/include/c++/14/bits/stl_bvector.h:99:5: note:   after user-defined conversion: 'std::_Bit_reference::operator bool() const'
   99 |     operator bool() const _GLIBCXX_NOEXCEPT
      |     ^~~~~~~~
/usr/include/c++/14/istream:181:7: note: candidate: 'std::basic_istream<_CharT, _Traits>& std::basic_istream<_CharT, _Traits>::operator>>(int&) [with _CharT = char; _Traits = std::char_traits<char>]' (near match)
  181 |       operator>>(int& __n);
      |       ^~~~~~~~
/usr/include/c++/14/istream:181:7: note:   conversion of argument 1 would be ill-formed:
a.cc:7:38: error: cannot bind non-const lvalue reference of type 'int&' to a value of type 'bool'
    7 |   for(int i = 0 ;i < 3;i++)cin >> S[i];
      |                                   ~~~^
/usr/include/c++/14/bits/stl_bvector.h:99:5: note:   after user-defined conversion: 'std::_Bit_reference::operator bool() const'
   99 |     operator bool() const _GLIBCXX_NOEXCEPT
      |     ^~~~~~~~
/usr/include/c++/14/istream:184:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  184 |       operator>>(unsigned int& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:184:7: note:   conversion of argument 1 would be ill-formed:
a.cc:7:38: error: cannot bind non-const lvalue reference of type 'unsigned int&' to a value of type 'bool'
    7 |   for(int i = 0 ;i < 3;i++)cin >> S[i];
      |                                   ~~~^
/usr/include/c++/14/bits/stl_bvector.h:99:5: note:   after user-defined conversion: 'std::_Bit_reference::operator bool() const'
   99 |     operator bool() const _GLIBCXX_NOEXCEPT
      |     ^~~~~~~~
/usr/include/c++/14/istream:188:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  188 |       operator>>(long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:188:7: note:   conversion of argument 1 would be ill-formed:
a.cc:7:38: error: cannot bind non-const lvalue reference of type 'long int&' to a value of type 'bool'
    7 |   for(int i = 0 ;i < 3;i++)cin >> S[i];
      |                                   ~~~^
/usr/include/c++/14/bits/stl_bvector.h:99:5: note:   after user-defined conversion: 'std::_Bit_reference::operator bool() const'
   99 |     operator bool() const _GLIBCXX_NOEXCEPT
      |     ^~~~~~~~
/usr/include/c++/14/istream:192:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  192 |       operator>>(unsigned long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:192:7: note:   conversion of argument 1 would be ill-formed:
a.cc:7:38: error: cannot bind non-const lvalue reference of type 'long unsigned int&' to a value of type 'bool'
    7 |   for(int i = 0 ;i < 3;i++)cin >> S[i];
      |                                   ~~~^
/usr/include/c++/14/bits/stl_bvector.h:99:5: note:   after user-defined conversion: 'std::_Bit_reference::operator bool() const'
   99 |     operator bool() const _GLIBCXX_NOEXCEPT
      |     ^~~~~~~~
/usr/include/c++/14/istream:199:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long long int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  199 |       operator>>(long long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:199:7: note:   conversion of argument 1 would be ill-formed:
a.cc:7:38: error: cannot bind non-const lvalue reference of type 'long long int&' to a value of type 'bool'
    7 |   for(int i = 0 ;i < 3;i++)cin >> S[i];
      |                                   ~~~^
/usr/include/c++/14/bits/stl_bvector.h:99:5: note:   after user-defined conversion: 'std::_Bit_reference::operator bool() const'
   99 |     operator bool() const _GLIBCXX_NOEXCEPT
      |     ^~~~~~~~
/usr/include/c++/14/istream:203:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long long unsigned int&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  203 |       operator>>(unsigned long long& __n)
      |       ^~~~~~~~
/usr/include/c++/14/istream:203:7: note:   conversion of argument 1 would be ill-formed:
a.cc:7:38: error: cannot bind non-const lvalue reference of type 'long long unsigned int&' to a value of type 'bool'
    7 |   for(int i = 0 ;i < 3;i++)cin >> S[i];
      |                                   ~~~^
/usr/include/c++/14/bits/stl_bvector.h:99:5: note:   after user-defined conversion: 'std::_Bit_reference::operator bool() const'
   99 |     operator bool() const _GLIBCXX_NOEXCEPT
      |     ^~~~~~~~
/usr/include/c++/14/istream:219:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(float&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  219 |       operator>>(float& __f)
      |       ^~~~~~~~
/usr/include/c++/14/istream:219:7: note:   conversion of argument 1 would be ill-formed:
a.cc:7:38: error: cannot bind non-const lvalue reference of type 'float&' to a value of type 'bool'
    7 |   for(int i = 0 ;i < 3;i++)cin >> S[i];
      |                                   ~~~^
/usr/include/c++/14/bits/stl_bvector.h:99:5: note:   after user-defined conversion: 'std::_Bit_reference::operator bool() const'
   99 |     operator bool() const _GLIBCXX_NOEXCEPT
      |     ^~~~~~~~
/usr/include/c++/14/istream:223:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(double&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = std::basic_istream<char>]' (near match)
  223 |       operator>>(double& __f)
      |       ^~~~~~~~
/usr/include/c++/14/istream:223:7: note:   conversion of argument 1 would be ill-formed:
a.cc:7:38: error: cannot bind non-const lvalue reference of type 'double&' to a value of type 'bool'
    7 |   for(int i = 0 ;i < 3;i++)cin >> S[i];
      |                                   ~~~^
/usr/include/c++/14/bits/stl_bvector.h:99:5: note:   after user-defined conversion: 'std::_Bit_reference::operator bool() const'
   99 |     operator bool() const _GLIBCXX_NOEXCEPT
      |     ^~~~~~~~
/usr/include/c++/14/istream:227:7: note: candidate: 'std::basic_istream<_CharT, _Traits>::__istream_type& std::basic_istream<_CharT, _Traits>::operator>>(long double&) [with _CharT = char; _Traits = std::char_traits<char>; __istream_type = s