Language: C++

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

int main() {
  
int P,Q,R;
  cin >>P>>Q>>R;
  vector<int> vec;
  vec ={R+Q,P+Q,P+R};
  
  if(vec.at(0)<vec.at(1) && vec.at(0)<vec.at(2)){
    cout << vec.at(0) <<endl;}
  if(vec.at(1)<vec.at(0) && vec,at(1)<vec.at(2)){
    cout <<vec.at(1) <<endl;}
  else{
    cout << vec.at(2) <<endl;}
  
}
     
  
  
  
}


Compiler output:
a.cc: In function 'int main()':
a.cc:13:26: error: no match for 'operator&&' (operand types are 'bool' and 'std::vector<int>')
   13 |   if(vec.at(1)<vec.at(0) && vec,at(1)<vec.at(2)){
      |      ~~~~~~~~~~~~~~~~~~~ ^~ ~~~
      |               |             |
      |               bool          std::vector<int>
a.cc:13:26: note: candidate: 'operator&&(bool, bool)' (built-in)
   13 |   if(vec.at(1)<vec.at(0) && vec,at(1)<vec.at(2)){
      |      ~~~~~~~~~~~~~~~~~~~~^~~~~~
a.cc:13:26: note:   no known conversion for argument 2 from 'std::vector<int>' to 'bool'
In file included from /usr/include/c++/14/valarray:605,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:166,
                 from a.cc:1:
/usr/include/c++/14/bits/valarray_after.h:415:5: note: candidate: 'template<class _Dom1, class _Dom2> std::_Expr<std::__detail::_BinClos<std::__logical_and, std::_Expr, std::_Expr, _Dom1, _Dom2>, typename std::__fun<std::__logical_and, typename _Dom1::value_type>::result_type> std::operator&&(const _Expr<_Dom1, typename _Dom1::value_type>&, const _Expr<_Dom2, typename _Dom2::value_type>&)'
  415 |     _DEFINE_EXPR_BINARY_OPERATOR(&&, struct std::__logical_and)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:415:5: note:   template argument deduction/substitution failed:
a.cc:13:29: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'bool'
   13 |   if(vec.at(1)<vec.at(0) && vec,at(1)<vec.at(2)){
      |                             ^~~
/usr/include/c++/14/bits/valarray_after.h:415:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__logical_and, std::_Expr, std::_Constant, _Dom, typename _Dom::value_type>, typename std::__fun<std::__logical_and, typename _Dom1::value_type>::result_type> std::operator&&(const _Expr<_Dom1, typename _Dom1::value_type>&, const typename _Dom::value_type&)'
  415 |     _DEFINE_EXPR_BINARY_OPERATOR(&&, struct std::__logical_and)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:415:5: note:   template argument deduction/substitution failed:
a.cc:13:29: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'bool'
   13 |   if(vec.at(1)<vec.at(0) && vec,at(1)<vec.at(2)){
      |                             ^~~
/usr/include/c++/14/bits/valarray_after.h:415:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__logical_and, std::_Constant, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__logical_and, typename _Dom1::value_type>::result_type> std::operator&&(const typename _Dom::value_type&, const _Expr<_Dom1, typename _Dom1::value_type>&)'
  415 |     _DEFINE_EXPR_BINARY_OPERATOR(&&, struct std::__logical_and)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:415:5: note:   template argument deduction/substitution failed:
a.cc:13:29: note:   'std::vector<int>' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
   13 |   if(vec.at(1)<vec.at(0) && vec,at(1)<vec.at(2)){
      |                             ^~~
/usr/include/c++/14/bits/valarray_after.h:415:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__logical_and, std::_Expr, std::_ValArray, _Dom, typename _Dom::value_type>, typename std::__fun<std::__logical_and, typename _Dom1::value_type>::result_type> std::operator&&(const _Expr<_Dom1, typename _Dom1::value_type>&, const valarray<typename _Dom::value_type>&)'
  415 |     _DEFINE_EXPR_BINARY_OPERATOR(&&, struct std::__logical_and)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:415:5: note:   template argument deduction/substitution failed:
a.cc:13:29: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'bool'
   13 |   if(vec.at(1)<vec.at(0) && vec,at(1)<vec.at(2)){
      |                             ^~~
/usr/include/c++/14/bits/valarray_after.h:415:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__logical_and, std::_ValArray, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__logical_and, typename _Dom1::value_type>::result_type> std::operator&&(const valarray<typename _Dom::value_type>&, const _Expr<_Dom1, typename _Dom1::value_type>&)'
  415 |     _DEFINE_EXPR_BINARY_OPERATOR(&&, struct std::__logical_and)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:415:5: note:   template argument deduction/substitution failed:
a.cc:13:29: note:   'std::vector<int>' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
   13 |   if(vec.at(1)<vec.at(0) && vec,at(1)<vec.at(2)){
      |                             ^~~
/usr/include/c++/14/valarray:1206:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__logical_and, std::_ValArray, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__logical_and, _Tp>::result_type> std::operator&&(const valarray<_Tp>&, const valarray<_Tp>&)'
 1206 | _DEFINE_BINARY_OPERATOR(&&, __logical_and)
      | ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/valarray:1206:1: note:   template argument deduction/substitution failed:
a.cc:13:29: note:   mismatched types 'const std::valarray<_Tp>' and 'bool'
   13 |   if(vec.at(1)<vec.at(0) && vec,at(1)<vec.at(2)){
      |                             ^~~
/usr/include/c++/14/valarray:1206:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__logical_and, std::_ValArray, std::_Constant, _Tp, _Tp>, typename std::__fun<std::__logical_and, _Tp>::result_type> std::operator&&(const valarray<_Tp>&, const typename valarray<_Tp>::value_type&)'
 1206 | _DEFINE_BINARY_OPERATOR(&&, __logical_and)
      | ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/valarray:1206:1: note:   template argument deduction/substitution failed:
a.cc:13:29: note:   mismatched types 'const std::valarray<_Tp>' and 'bool'
   13 |   if(vec.at(1)<vec.at(0) && vec,at(1)<vec.at(2)){
      |                             ^~~
/usr/include/c++/14/valarray:1206:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__logical_and, std::_Constant, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__logical_and, _Tp>::result_type> std::operator&&(const typename valarray<_Tp>::value_type&, const valarray<_Tp>&)'
 1206 | _DEFINE_BINARY_OPERATOR(&&, __logical_and)
      | ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/valarray:1206:1: note:   template argument deduction/substitution failed:
a.cc:13:29: note:   'std::vector<int>' is not derived from 'const std::valarray<_Tp>'
   13 |   if(vec.at(1)<vec.at(0) && vec,at(1)<vec.at(2)){
      |                             ^~~
a.cc:13:33: error: 'at' was not declared in this scope
   13 |   if(vec.at(1)<vec.at(0) && vec,at(1)<vec.at(2)){
      |                                 ^~
a.cc: At global scope:
a.cc:23:1: error: expected declaration before '}' token
   23 | }
      | ^