Language: C++

#include <iostream>
#include <cstdlib>
#include <vector>
#include <algorithm>
#include <cstring>
using namespace std;

int main(int argc, char *argv[])
{
    int i, j, n;
	char input[16];
	vector<string> word;

	for (i = 0; i < n; i++) {
		cin >> input;
		word.push_back(input);
	    for (i = 0; i < 16; i++)
			input[i] = '\0';
	}

	for (i = 0; i < n; i++) {
		for (j = i + 1; j < n; j++) {
			if (word[i] == word[j]) {
				cout << "No" << endl;
				return 0;
			}
		}
	}

	for (i = 0; i < n - 1; i++) {
		if (word[i].end() == word[i + i].front()) {
			continue;
		} else {
			break;
		}
	}
	
	if (i == n - 1) 
		cout << "Yes" << endl;
	else
		cout << "No" << endl;
	
	return 0;
}


Compiler output:
a.cc: In function 'int main(int, char**)':
a.cc:31:35: error: no match for 'operator==' (operand types are 'std::__cxx11::basic_string<char>::iterator' and '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'})
   31 |                 if (word[i].end() == word[i + i].front()) {
      |                     ~~~~~~~~~~~~~ ^~ ~~~~~~~~~~~~~~~~~~~
      |                                |                      |
      |                                |                      __gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type {aka char}
      |                                std::__cxx11::basic_string<char>::iterator
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:192:5: note: candidate: 'template<class _StateT> bool std::operator==(const fpos<_StateT>&, const fpos<_StateT>&)'
  192 |     operator==(const fpos<_StateT>& __lhs, const fpos<_StateT>& __rhs)
      |     ^~~~~~~~
/usr/include/c++/14/bits/postypes.h:192:5: note:   template argument deduction/substitution failed:
a.cc:31:56: note:   'std::__cxx11::basic_string<char>::iterator' is not derived from 'const std::fpos<_StateT>'
   31 |                 if (word[i].end() == word[i + i].front()) {
      |                                                        ^
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:235:5: note: candidate: 'template<class _T1, class _T2> bool std::operator==(const allocator<_CharT>&, const allocator<_T2>&)'
  235 |     operator==(const allocator<_T1>&, const allocator<_T2>&)
      |     ^~~~~~~~
/usr/include/c++/14/bits/allocator.h:235:5: note:   template argument deduction/substitution failed:
a.cc:31:56: note:   'std::__cxx11::basic_string<char>::iterator' is not derived from 'const std::allocator<_CharT>'
   31 |                 if (word[i].end() == word[i + i].front()) {
      |                                                        ^
In file included from /usr/include/c++/14/string:48:
/usr/include/c++/14/bits/stl_iterator.h:441:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator==(const reverse_iterator<_Iterator>&, const reverse_iterator<_Iterator>&)'
  441 |     operator==(const reverse_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:441:5: note:   template argument deduction/substitution failed:
a.cc:31:56: note:   'std::__cxx11::basic_string<char>::iterator' is not derived from 'const std::reverse_iterator<_Iterator>'
   31 |                 if (word[i].end() == word[i + i].front()) {
      |                                                        ^
/usr/include/c++/14/bits/stl_iterator.h:486:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator==(const reverse_iterator<_Iterator>&, const reverse_iterator<_IteratorR>&)'
  486 |     operator==(const reverse_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:486:5: note:   template argument deduction/substitution failed:
a.cc:31:56: note:   'std::__cxx11::basic_string<char>::iterator' is not derived from 'const std::reverse_iterator<_Iterator>'
   31 |                 if (word[i].end() == word[i + i].front()) {
      |                                                        ^
/usr/include/c++/14/bits/stl_iterator.h:1667:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator==(const move_iterator<_IteratorL>&, const move_iterator<_IteratorR>&)'
 1667 |     operator==(const move_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1667:5: note:   template argument deduction/substitution failed:
a.cc:31:56: note:   'std::__cxx11::basic_string<char>::iterator' is not derived from 'const std::move_iterator<_IteratorL>'
   31 |                 if (word[i].end() == word[i + i].front()) {
      |                                                        ^
/usr/include/c++/14/bits/stl_iterator.h:1737:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator==(const move_iterator<_IteratorL>&, const move_iterator<_IteratorL>&)'
 1737 |     operator==(const move_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1737:5: note:   template argument deduction/substitution failed:
a.cc:31:56: note:   'std::__cxx11::basic_string<char>::iterator' is not derived from 'const std::move_iterator<_IteratorL>'
   31 |                 if (word[i].end() == word[i + i].front()) {
      |                                                        ^
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:1033:5: note: candidate: 'template<class _T1, class _T2> constexpr bool std::operator==(const pair<_T1, _T2>&, const pair<_T1, _T2>&)'
 1033 |     operator==(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_pair.h:1033:5: note:   template argument deduction/substitution failed:
a.cc:31:56: note:   'std::__cxx11::basic_string<char>::iterator' is not derived from 'const std::pair<_T1, _T2>'
   31 |                 if (word[i].end() == word[i + i].front()) {
      |                                                        ^
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:629:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator==(basic_string_view<_CharT, _Traits>, __type_identity_t<basic_string_view<_CharT, _Traits> >)'
  629 |     operator==(basic_string_view<_CharT, _Traits> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:629:5: note:   template argument deduction/substitution failed:
a.cc:31:56: note:   '__gnu_cxx::__normal_iterator<char*, std::__cxx11::basic_string<char> >' is not derived from 'std::basic_string_view<_CharT, _Traits>'
   31 |                 if (word[i].end() == word[i + i].front()) {
      |                                                        ^
/usr/include/c++/14/string_view:637:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator==(basic_string_view<_CharT, _Traits>, basic_string_view<_CharT, _Traits>)'
  637 |     operator==(basic_string_view<_CharT, _Traits> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:637:5: note:   template argument deduction/substitution failed:
a.cc:31:56: note:   '__gnu_cxx::__normal_iterator<char*, std::__cxx11::basic_string<char> >' is not derived from 'std::basic_string_view<_CharT, _Traits>'
   31 |                 if (word[i].end() == word[i + i].front()) {
      |                                                        ^
/usr/include/c++/14/string_view:644:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator==(__type_identity_t<basic_string_view<_CharT, _Traits> >, basic_string_view<_CharT, _Traits>)'
  644 |     operator==(__type_identity_t<basic_string_view<_CharT, _Traits>> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:644:5: note:   template argument deduction/substitution failed:
a.cc:31:56: note:   mismatched types 'std::basic_string_view<_CharT, _Traits>' and 'char'
   31 |                 if (word[i].end() == word[i + i].front()) {
      |                                                        ^
/usr/include/c++/14/bits/basic_string.h:3755:5: 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>&)'
 3755 |     operator==(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3755:5: note:   template argument deduction/substitution failed:
a.cc:31:56: note:   'std::__cxx11::basic_string<char>::iterator' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   31 |                 if (word[i].end() == word[i + i].front()) {
      |                                                        ^
/usr/include/c++/14/bits/basic_string.h:3772:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator==(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, const _CharT*)'
 3772 |     operator==(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3772:5: note:   template argument deduction/substitution failed:
a.cc:31:56: note:   'std::__cxx11::basic_string<char>::iterator' is not derived from 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>'
   31 |                 if (word[i].end() == word[i + i].front()) {
      |                                                        ^
/usr/include/c++/14/bits/basic_string.h:3819:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator==(const _CharT*, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 3819 |     operator==(const _CharT* __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3819:5: note:   template argument deduction/substitution failed:
a.cc:31:56: note:   mismatched types 'const _CharT*' and '__gnu_cxx::__normal_iterator<char*, std::__cxx11::basic_string<char> >'
   31 |                 if (word[i].end() == word[i + i].front()) {
      |                                                        ^
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:2558:5: note: candidate: 'template<class ... _TElements, class ... _UElements> constexpr bool std::operator==(const tuple<_UTypes ...>&, const tuple<_Elements ...>&)'
 2558 |     o