Language: C++

#include <iostream>
using namespace std;

int main()
{
    int l, a[3];

    int i = 0;
    while (cin >> l) {
        a[i] = l;
        i++;
    }
    
    bool flag = false;
    
    if (a[0] == a[1] && a[0] != [2]) {
        flag = true;
    } else if (a[0] == a[2] && a[0] != [1]) {
        flag = true;
    }else if (a[1] == a[2] && a[0] != [1]) {
        flag = true;
    }
    
    if (flag == false) {
        cout << "No"
    } else {
        cout << "Yes"
    }
    
    

    // for (i = 0; i < 3; i++) {
    //     cout << a[i];
    // }

}

Compiler output:
a.cc: In function 'int main()':
a.cc:16:34: error: expected identifier before numeric constant
   16 |     if (a[0] == a[1] && a[0] != [2]) {
      |                                  ^
a.cc: In lambda function:
a.cc:16:36: error: expected '{' before ')' token
   16 |     if (a[0] == a[1] && a[0] != [2]) {
      |                                    ^
a.cc: In function 'int main()':
a.cc:16:30: error: no match for 'operator!=' (operand types are 'int' and 'main()::<lambda()>')
   16 |     if (a[0] == a[1] && a[0] != [2]) {
      |                         ~~~~ ^~ ~~~
      |                            |    |
      |                            int  main()::<lambda()>
In file included from /usr/include/c++/14/iosfwd:42,
                 from /usr/include/c++/14/ios:40,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/postypes.h:197:5: note: candidate: 'template<class _StateT> bool std::operator!=(const fpos<_StateT>&, const fpos<_StateT>&)'
  197 |     operator!=(const fpos<_StateT>& __lhs, const fpos<_StateT>& __rhs)
      |     ^~~~~~~~
/usr/include/c++/14/bits/postypes.h:197:5: note:   template argument deduction/substitution failed:
a.cc:16:36: note:   mismatched types 'const std::fpos<_StateT>' and 'int'
   16 |     if (a[0] == a[1] && a[0] != [2]) {
      |                                    ^
In file included from /usr/include/c++/14/string:43,
                 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:
/usr/include/c++/14/bits/allocator.h:243:5: note: candidate: 'template<class _T1, class _T2> bool std::operator!=(const allocator<_CharT>&, const allocator<_T2>&)'
  243 |     operator!=(const allocator<_T1>&, const allocator<_T2>&)
      |     ^~~~~~~~
/usr/include/c++/14/bits/allocator.h:243:5: note:   template argument deduction/substitution failed:
a.cc:16:36: note:   mismatched types 'const std::allocator<_CharT>' and 'int'
   16 |     if (a[0] == a[1] && a[0] != [2]) {
      |                                    ^
In file included from /usr/include/c++/14/string:48:
/usr/include/c++/14/bits/stl_iterator.h:455:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator!=(const reverse_iterator<_Iterator>&, const reverse_iterator<_Iterator>&)'
  455 |     operator!=(const reverse_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:455:5: note:   template argument deduction/substitution failed:
a.cc:16:36: note:   mismatched types 'const std::reverse_iterator<_Iterator>' and 'int'
   16 |     if (a[0] == a[1] && a[0] != [2]) {
      |                                    ^
/usr/include/c++/14/bits/stl_iterator.h:500:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator!=(const reverse_iterator<_Iterator>&, const reverse_iterator<_IteratorR>&)'
  500 |     operator!=(const reverse_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:500:5: note:   template argument deduction/substitution failed:
a.cc:16:36: note:   mismatched types 'const std::reverse_iterator<_Iterator>' and 'int'
   16 |     if (a[0] == a[1] && a[0] != [2]) {
      |                                    ^
/usr/include/c++/14/bits/stl_iterator.h:1686:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator!=(const move_iterator<_IteratorL>&, const move_iterator<_IteratorR>&)'
 1686 |     operator!=(const move_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1686:5: note:   template argument deduction/substitution failed:
a.cc:16:36: note:   mismatched types 'const std::move_iterator<_IteratorL>' and 'int'
   16 |     if (a[0] == a[1] && a[0] != [2]) {
      |                                    ^
/usr/include/c++/14/bits/stl_iterator.h:1753:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator!=(const move_iterator<_IteratorL>&, const move_iterator<_IteratorL>&)'
 1753 |     operator!=(const move_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1753:5: note:   template argument deduction/substitution failed:
a.cc:16:36: note:   mismatched types 'const std::move_iterator<_IteratorL>' and 'int'
   16 |     if (a[0] == a[1] && a[0] != [2]) {
      |                                    ^
In file included from /usr/include/c++/14/bits/stl_algobase.h:64,
                 from /usr/include/c++/14/string:51:
/usr/include/c++/14/bits/stl_pair.h:1052:5: note: candidate: 'template<class _T1, class _T2> constexpr bool std::operator!=(const pair<_T1, _T2>&, const pair<_T1, _T2>&)'
 1052 |     operator!=(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_pair.h:1052:5: note:   template argument deduction/substitution failed:
a.cc:16:36: note:   mismatched types 'const std::pair<_T1, _T2>' and 'int'
   16 |     if (a[0] == a[1] && a[0] != [2]) {
      |                                    ^
In file included from /usr/include/c++/14/bits/basic_string.h:47,
                 from /usr/include/c++/14/string:54:
/usr/include/c++/14/string_view:651:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator!=(basic_string_view<_CharT, _Traits>, basic_string_view<_CharT, _Traits>)'
  651 |     operator!=(basic_string_view<_CharT, _Traits> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:651:5: note:   template argument deduction/substitution failed:
a.cc:16:36: note:   mismatched types 'std::basic_string_view<_CharT, _Traits>' and 'int'
   16 |     if (a[0] == a[1] && a[0] != [2]) {
      |                                    ^
/usr/include/c++/14/string_view:658:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator!=(basic_string_view<_CharT, _Traits>, __type_identity_t<basic_string_view<_CharT, _Traits> >)'
  658 |     operator!=(basic_string_view<_CharT, _Traits> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:658:5: note:   template argument deduction/substitution failed:
a.cc:16:36: note:   mismatched types 'std::basic_string_view<_CharT, _Traits>' and 'int'
   16 |     if (a[0] == a[1] && a[0] != [2]) {
      |                                    ^
/usr/include/c++/14/string_view:666:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator!=(__type_identity_t<basic_string_view<_CharT, _Traits> >, basic_string_view<_CharT, _Traits>)'
  666 |     operator!=(__type_identity_t<basic_string_view<_CharT, _Traits>> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:666:5: note:   template argument deduction/substitution failed:
a.cc:16:36: note:   'main()::<lambda()>' is not derived from 'std::basic_string_view<_CharT, _Traits>'
   16 |     if (a[0] == a[1] && a[0] != [2]) {
      |                                    ^
/usr/include/c++/14/bits/basic_string.h:3833:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator!=(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3833 |     operator!=(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3833:5: note:   template argument deduction/substitution failed:
a.cc:16:36: note:   mismatched types 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'int'
   16 |     if (a[0] == a[1] && a[0] != [2]) {
      |                                    ^
/usr/include/c++/14/bits/basic_string.h:3847:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator!=(const _CharT*, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3847 |     operator!=(const _CharT* __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3847:5: note:   template argument deduction/substitution failed:
a.cc:16:36: note:   mismatched types 'const _CharT*' and 'int'
   16 |     if (a[0] == a[1] && a[0] != [2]) {
      |                                    ^
/usr/include/c++/14/bits/basic_string.h:3860:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator!=(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, const _CharT*)'
 3860 |     operator!=(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3860:5: note:   template argument deduction/substitution failed:
a.cc:16:36: note:   mismatched types 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'int'
   16 |     if (a[0] == a[1] && a[0] != [2]) {
      |                                    ^
In file included from /usr/include/c++/14/bits/memory_resource.h:47,
                 from /usr/include/c++/14/string:68:
/usr/include/c++/14/tuple:2613:5: note: candidate: 'template<class ... _TElements, class ... _UElements> constexpr bool std::operator!=(const tuple<_UTypes ...>&, const tuple<_Elements ...>&)'
 2613 |     operator!=(const tuple<_TElements...>& __t,
      |     ^~~~~~~~
/usr/include/c++/14/tuple:2613:5: note:   template argument deduction/substitution failed:
a.cc:16:36: note:   mismatched types 'const std::tuple<_UTypes ...>' and 'int'
   16 |     if (a[0] == a[1] && a[0] != [2]) {
      |                                    ^
In file included from /usr/include/c++/14/bits/locale_facets.h:48,
                 from /usr/include/c++/14/bits/basic_ios.h:37,
                 from /usr/include/c++/14/ios:46:
/usr/include/c++/14/bits/streambuf_iterator.h:242:5: note: candidate: 'template<class _CharT, class _Traits> bool std::operator!=(const istreambuf_iterator<_CharT, _Traits>&, const istreambuf_iterator<_CharT, _Traits>&)'
  242 |     operator!=(const istreambuf_iterator<_CharT, _Traits>& __a,
      |     ^~~~~~~~
/usr/include/c++/14/bits/streambuf_iterator.h:242:5: note:   template argument deduction/substitution failed:
a.cc:16:36: note:   mismatched types 'const std::istreambuf_iterator<_CharT, _Traits>' and 'int'
   16 |     if (a[