Language: C++

#include<bits/stdc++.h>
#define int long long
#define P pair<int,int>
#define PP pair<P,int>
#define F first
#define S second
#define f(i,n) for(int i=0;i<(n);i++)
#define INF LLONG_MAX/3
#define eps LDBL_EPSILON
#define mod (int)(1000000007)
#define pie 3.141592653589793238462643383279
#define Bpri priority_queue
#define Spri priority_queue<P,vector<P>,greater<P>>
using namespace std;
signed main(){
	string s;
	cin>>s;
	if(((stoi(s.substr(0,2))>=13||stoi(s.substr(0,2))==0)&&((stoi(s.substr(2,2))>=13)||stoi(s.substr(2,2)==0))))puts("NA");
	else if(stoi(s.substr(2,2))>=13)puts("MMYY");
	else if(stoi(s.substr(0,2))>=13)puts("YYMM");
	else puts("AMBIGUOUS");
	return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:18:110: error: no match for 'operator==' (operand types are 'std::__cxx11::basic_string<char>' and 'int')
   18 |         if(((stoi(s.substr(0,2))>=13||stoi(s.substr(0,2))==0)&&((stoi(s.substr(2,2))>=13)||stoi(s.substr(2,2)==0))))puts("NA");
      |                                                                                                 ~~~~~~~~~~~~~^~~
      |                                                                                                         |      |
      |                                                                                                         |      int
      |                                                                                                         std::__cxx11::basic_string<char>
In file included from /usr/include/c++/14/regex:68,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:181,
                 from a.cc:1:
/usr/include/c++/14/bits/regex.h:1103:5: note: candidate: 'template<class _BiIter> bool std::__cxx11::operator==(const sub_match<_BiIter>&, const sub_match<_BiIter>&)'
 1103 |     operator==(const sub_match<_BiIter>& __lhs, const sub_match<_BiIter>& __rhs)
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1103:5: note:   template argument deduction/substitution failed:
a.cc:18:112: note:   'std::__cxx11::basic_string<char>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   18 |         if(((stoi(s.substr(0,2))>=13||stoi(s.substr(0,2))==0)&&((stoi(s.substr(2,2))>=13)||stoi(s.substr(2,2)==0))))puts("NA");
      |                                                                                                                ^
/usr/include/c++/14/bits/regex.h:1199:5: note: candidate: 'template<class _Bi_iter, class _Ch_traits, class _Ch_alloc> bool std::__cxx11::operator==(__sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>&, const sub_match<_BiIter>&)'
 1199 |     operator==(const __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1199:5: note:   template argument deduction/substitution failed:
a.cc:18:112: note:   mismatched types 'const std::__cxx11::sub_match<_BiIter>' and 'int'
   18 |         if(((stoi(s.substr(0,2))>=13||stoi(s.substr(0,2))==0)&&((stoi(s.substr(2,2))>=13)||stoi(s.substr(2,2)==0))))puts("NA");
      |                                                                                                                ^
/usr/include/c++/14/bits/regex.h:1274:5: note: candidate: 'template<class _Bi_iter, class _Ch_traits, class _Ch_alloc> bool std::__cxx11::operator==(const sub_match<_BiIter>&, __sub_match_string<_Bi_iter, _Ch_traits, _Ch_alloc>&)'
 1274 |     operator==(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1274:5: note:   template argument deduction/substitution failed:
a.cc:18:112: note:   'std::__cxx11::basic_string<char>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   18 |         if(((stoi(s.substr(0,2))>=13||stoi(s.substr(0,2))==0)&&((stoi(s.substr(2,2))>=13)||stoi(s.substr(2,2)==0))))puts("NA");
      |                                                                                                                ^
/usr/include/c++/14/bits/regex.h:1366:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator==(const typename std::iterator_traits<_Iter>::value_type*, const sub_match<_BiIter>&)'
 1366 |     operator==(typename iterator_traits<_Bi_iter>::value_type const* __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1366:5: note:   template argument deduction/substitution failed:
a.cc:18:112: note:   mismatched types 'const std::__cxx11::sub_match<_BiIter>' and 'int'
   18 |         if(((stoi(s.substr(0,2))>=13||stoi(s.substr(0,2))==0)&&((stoi(s.substr(2,2))>=13)||stoi(s.substr(2,2)==0))))puts("NA");
      |                                                                                                                ^
/usr/include/c++/14/bits/regex.h:1441:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator==(const sub_match<_BiIter>&, const typename std::iterator_traits<_Iter>::value_type*)'
 1441 |     operator==(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1441:5: note:   template argument deduction/substitution failed:
a.cc:18:112: note:   'std::__cxx11::basic_string<char>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   18 |         if(((stoi(s.substr(0,2))>=13||stoi(s.substr(0,2))==0)&&((stoi(s.substr(2,2))>=13)||stoi(s.substr(2,2)==0))))puts("NA");
      |                                                                                                                ^
/usr/include/c++/14/bits/regex.h:1534:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator==(const typename std::iterator_traits<_Iter>::value_type&, const sub_match<_BiIter>&)'
 1534 |     operator==(typename iterator_traits<_Bi_iter>::value_type const& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1534:5: note:   template argument deduction/substitution failed:
a.cc:18:112: note:   mismatched types 'const std::__cxx11::sub_match<_BiIter>' and 'int'
   18 |         if(((stoi(s.substr(0,2))>=13||stoi(s.substr(0,2))==0)&&((stoi(s.substr(2,2))>=13)||stoi(s.substr(2,2)==0))))puts("NA");
      |                                                                                                                ^
/usr/include/c++/14/bits/regex.h:1613:5: note: candidate: 'template<class _Bi_iter> bool std::__cxx11::operator==(const sub_match<_BiIter>&, const typename std::iterator_traits<_Iter>::value_type&)'
 1613 |     operator==(const sub_match<_Bi_iter>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:1613:5: note:   template argument deduction/substitution failed:
a.cc:18:112: note:   'std::__cxx11::basic_string<char>' is not derived from 'const std::__cxx11::sub_match<_BiIter>'
   18 |         if(((stoi(s.substr(0,2))>=13||stoi(s.substr(0,2))==0)&&((stoi(s.substr(2,2))>=13)||stoi(s.substr(2,2)==0))))puts("NA");
      |                                                                                                                ^
/usr/include/c++/14/bits/regex.h:2186:5: note: candidate: 'template<class _Bi_iter, class _Alloc> bool std::__cxx11::operator==(const match_results<_BiIter, _Alloc>&, const match_results<_BiIter, _Alloc>&)'
 2186 |     operator==(const match_results<_Bi_iter, _Alloc>& __m1,
      |     ^~~~~~~~
/usr/include/c++/14/bits/regex.h:2186:5: note:   template argument deduction/substitution failed:
a.cc:18:112: note:   'std::__cxx11::basic_string<char>' is not derived from 'const std::__cxx11::match_results<_BiIter, _Alloc>'
   18 |         if(((stoi(s.substr(0,2))>=13||stoi(s.substr(0,2))==0)&&((stoi(s.substr(2,2))>=13)||stoi(s.substr(2,2)==0))))puts("NA");
      |                                                                                                                ^
In file included from /usr/include/c++/14/bits/stl_algobase.h:64,
                 from /usr/include/c++/14/algorithm:60,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h: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:18:112: note:   'std::__cxx11::basic_string<char>' is not derived from 'const std::pair<_T1, _T2>'
   18 |         if(((stoi(s.substr(0,2))>=13||stoi(s.substr(0,2))==0)&&((stoi(s.substr(2,2))>=13)||stoi(s.substr(2,2)==0))))puts("NA");
      |                                                                                                                ^
In file included from /usr/include/c++/14/bits/stl_algobase.h:67:
/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:18:112: note:   'std::__cxx11::basic_string<char>' is not derived from 'const std::reverse_iterator<_Iterator>'
   18 |         if(((stoi(s.substr(0,2))>=13||stoi(s.substr(0,2))==0)&&((stoi(s.substr(2,2))>=13)||stoi(s.substr(2,2)==0))))puts("NA");
      |                                                                                                                ^
/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:18:112: note:   'std::__cxx11::basic_string<char>' is not derived from 'const std::reverse_iterator<_Iterator>'
   18 |         if(((stoi(s.substr(0,2))>=13||stoi(s.substr(0,2))==0)&&((stoi(s.substr(2,2))>=13)||stoi(s.substr(2,2)==0))))puts("NA");
      |                                                                                                                ^
/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:18:112: note:   'std::__cxx11::basic_string<char>' is not derived from 'const std::move_iterator<_IteratorL>'
   18 |         if(((stoi(s.substr(0,2))>=13||stoi(s.substr(0,2))==0)&&((stoi(s.substr(2,2))>=13)||stoi(s.substr(2,2)==0))))puts("NA");
      |