Language: C++

#include<bits/stdc++.h>
using namespace std;
using ll = long long;
using ull = unsigned long long;
#define re(i,n) for(ll i=0;i<n;++i)
#define ocut cout
#define ouct cout
#define itn int
struct Union{
  vector<int> par;
  Union(int a){
  par=vector<int>(a,-1);
  }
  int find(int a){
    if(par[a]<0){
      return a;
    }
    else{
      return par[a]=find(par[a]);
    }
  }
  bool same(int a,int b){
    return (find(a)==find(b));
  }
  int size(int a){
    return -par[find(a)];
  }
  void unite(int a,int b){
    int c=find(a),d=find(b);
    if(c==d)
      return;
    if(size(c)<size(d)){
      swap(c,d);
    }
    par[c]+=par[d];
    par[d]=c;
  }
};
int main(){
    string a;
    cin >> a;
    if(a=="hi"||a=="hihi"||a="hihihi"||a="hihihihi"||a="hihihihihi")cout << "Yes";
    else cout << "No";
}

Compiler output:
a.cc: In function 'int main()':
a.cc:42:26: error: no match for 'operator||' (operand types are 'bool' and 'std::string' {aka 'std::__cxx11::basic_string<char>'})
   42 |     if(a=="hi"||a=="hihi"||a="hihihi"||a="hihihihi"||a="hihihihihi")cout << "Yes";
      |        ~~~~~~~~~~~~~~~~~~^~~
      |               |            |
      |               bool         std::string {aka std::__cxx11::basic_string<char>}
a.cc:42:26: note: candidate: 'operator||(bool, bool)' (built-in)
   42 |     if(a=="hi"||a=="hihi"||a="hihihi"||a="hihihihi"||a="hihihihihi")cout << "Yes";
      |        ~~~~~~~~~~~~~~~~~~^~~
a.cc:42:26: note:   no known conversion for argument 2 from 'std::string' {aka 'std::__cxx11::basic_string<char>'} 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:416:5: note: candidate: 'template<class _Dom1, class _Dom2> std::_Expr<std::__detail::_BinClos<std::__logical_or, std::_Expr, std::_Expr, _Dom1, _Dom2>, typename std::__fun<std::__logical_or, typename _Dom1::value_type>::result_type> std::operator||(const _Expr<_Dom1, typename _Dom1::value_type>&, const _Expr<_Dom2, typename _Dom2::value_type>&)'
  416 |     _DEFINE_EXPR_BINARY_OPERATOR(||, struct std::__logical_or)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:416:5: note:   template argument deduction/substitution failed:
a.cc:42:28: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'bool'
   42 |     if(a=="hi"||a=="hihi"||a="hihihi"||a="hihihihi"||a="hihihihihi")cout << "Yes";
      |                            ^
/usr/include/c++/14/bits/valarray_after.h:416:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__logical_or, std::_Expr, std::_Constant, _Dom, typename _Dom::value_type>, typename std::__fun<std::__logical_or, typename _Dom1::value_type>::result_type> std::operator||(const _Expr<_Dom1, typename _Dom1::value_type>&, const typename _Dom::value_type&)'
  416 |     _DEFINE_EXPR_BINARY_OPERATOR(||, struct std::__logical_or)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:416:5: note:   template argument deduction/substitution failed:
a.cc:42:28: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'bool'
   42 |     if(a=="hi"||a=="hihi"||a="hihihi"||a="hihihihi"||a="hihihihihi")cout << "Yes";
      |                            ^
/usr/include/c++/14/bits/valarray_after.h:416:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__logical_or, std::_Constant, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__logical_or, typename _Dom1::value_type>::result_type> std::operator||(const typename _Dom::value_type&, const _Expr<_Dom1, typename _Dom1::value_type>&)'
  416 |     _DEFINE_EXPR_BINARY_OPERATOR(||, struct std::__logical_or)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:416:5: note:   template argument deduction/substitution failed:
a.cc:42:28: note:   'std::string' {aka 'std::__cxx11::basic_string<char>'} is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
   42 |     if(a=="hi"||a=="hihi"||a="hihihi"||a="hihihihi"||a="hihihihihi")cout << "Yes";
      |                            ^
/usr/include/c++/14/bits/valarray_after.h:416:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__logical_or, std::_Expr, std::_ValArray, _Dom, typename _Dom::value_type>, typename std::__fun<std::__logical_or, typename _Dom1::value_type>::result_type> std::operator||(const _Expr<_Dom1, typename _Dom1::value_type>&, const valarray<typename _Dom::value_type>&)'
  416 |     _DEFINE_EXPR_BINARY_OPERATOR(||, struct std::__logical_or)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:416:5: note:   template argument deduction/substitution failed:
a.cc:42:28: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'bool'
   42 |     if(a=="hi"||a=="hihi"||a="hihihi"||a="hihihihi"||a="hihihihihi")cout << "Yes";
      |                            ^
/usr/include/c++/14/bits/valarray_after.h:416:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__logical_or, std::_ValArray, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__logical_or, typename _Dom1::value_type>::result_type> std::operator||(const valarray<typename _Dom::value_type>&, const _Expr<_Dom1, typename _Dom1::value_type>&)'
  416 |     _DEFINE_EXPR_BINARY_OPERATOR(||, struct std::__logical_or)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:416:5: note:   template argument deduction/substitution failed:
a.cc:42:28: note:   'std::string' {aka 'std::__cxx11::basic_string<char>'} is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
   42 |     if(a=="hi"||a=="hihi"||a="hihihi"||a="hihihihi"||a="hihihihihi")cout << "Yes";
      |                            ^
/usr/include/c++/14/valarray:1207:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__logical_or, std::_ValArray, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__logical_or, _Tp>::result_type> std::operator||(const valarray<_Tp>&, const valarray<_Tp>&)'
 1207 | _DEFINE_BINARY_OPERATOR(||, __logical_or)
      | ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/valarray:1207:1: note:   template argument deduction/substitution failed:
a.cc:42:28: note:   mismatched types 'const std::valarray<_Tp>' and 'bool'
   42 |     if(a=="hi"||a=="hihi"||a="hihihi"||a="hihihihi"||a="hihihihihi")cout << "Yes";
      |                            ^
/usr/include/c++/14/valarray:1207:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__logical_or, std::_ValArray, std::_Constant, _Tp, _Tp>, typename std::__fun<std::__logical_or, _Tp>::result_type> std::operator||(const valarray<_Tp>&, const typename valarray<_Tp>::value_type&)'
 1207 | _DEFINE_BINARY_OPERATOR(||, __logical_or)
      | ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/valarray:1207:1: note:   template argument deduction/substitution failed:
a.cc:42:28: note:   mismatched types 'const std::valarray<_Tp>' and 'bool'
   42 |     if(a=="hi"||a=="hihi"||a="hihihi"||a="hihihihi"||a="hihihihihi")cout << "Yes";
      |                            ^
/usr/include/c++/14/valarray:1207:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__logical_or, std::_Constant, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__logical_or, _Tp>::result_type> std::operator||(const typename valarray<_Tp>::value_type&, const valarray<_Tp>&)'
 1207 | _DEFINE_BINARY_OPERATOR(||, __logical_or)
      | ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/valarray:1207:1: note:   template argument deduction/substitution failed:
a.cc:42:28: note:   'std::string' {aka 'std::__cxx11::basic_string<char>'} is not derived from 'const std::valarray<_Tp>'
   42 |     if(a=="hi"||a=="hihi"||a="hihihi"||a="hihihihi"||a="hihihihihi")cout << "Yes";
      |                            ^
a.cc:42:38: error: no match for 'operator||' (operand types are 'const char [7]' and 'std::string' {aka 'std::__cxx11::basic_string<char>'})
   42 |     if(a=="hi"||a=="hihi"||a="hihihi"||a="hihihihi"||a="hihihihihi")cout << "Yes";
      |                              ~~~~~~~~^~~
      |                              |         |
      |                              |         std::string {aka std::__cxx11::basic_string<char>}
      |                              const char [7]
a.cc:42:38: note: candidate: 'operator||(bool, bool)' (built-in)
   42 |     if(a=="hi"||a=="hihi"||a="hihihi"||a="hihihihi"||a="hihihihihi")cout << "Yes";
      |                              ~~~~~~~~^~~
a.cc:42:38: note:   no known conversion for argument 2 from 'std::string' {aka 'std::__cxx11::basic_string<char>'} to 'bool'
/usr/include/c++/14/bits/valarray_after.h:416:5: note: candidate: 'template<class _Dom1, class _Dom2> std::_Expr<std::__detail::_BinClos<std::__logical_or, std::_Expr, std::_Expr, _Dom1, _Dom2>, typename std::__fun<std::__logical_or, typename _Dom1::value_type>::result_type> std::operator||(const _Expr<_Dom1, typename _Dom1::value_type>&, const _Expr<_Dom2, typename _Dom2::value_type>&)'
  416 |     _DEFINE_EXPR_BINARY_OPERATOR(||, struct std::__logical_or)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:416:5: note:   template argument deduction/substitution failed:
a.cc:42:40: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'const char [7]'
   42 |     if(a=="hi"||a=="hihi"||a="hihihi"||a="hihihihi"||a="hihihihihi")cout << "Yes";
      |                                        ^
/usr/include/c++/14/bits/valarray_after.h:416:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__logical_or, std::_Expr, std::_Constant, _Dom, typename _Dom::value_type>, typename std::__fun<std::__logical_or, typename _Dom1::value_type>::result_type> std::operator||(const _Expr<_Dom1, typename _Dom1::value_type>&, const typename _Dom::value_type&)'
  416 |     _DEFINE_EXPR_BINARY_OPERATOR(||, struct std::__logical_or)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:416:5: note:   template argument deduction/substitution failed:
a.cc:42:40: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'const char [7]'
   42 |     if(a=="hi"||a=="hihi"||a="hihihi"||a="hihihihi"||a="hihihihihi")cout << "Yes";
      |                                        ^
/usr/include/c++/14/bits/valarray_after.h:416:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__logical_or, std::_Constant, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__logical_or, typename _Dom1::value_type>::result_type> std::operator||(const typename _Dom::value_type&, const _Expr<_Dom1, typename _Dom1::value_type>&)'
  416 |     _DEFINE_EXPR_BINARY_OPERATOR(||, struc