Language: C++

#include <iostream>
#include <vector>
#include <string>
#include <tuple>
#include <algorithm>

using namespace std;

int main() {
	int N, A, B, C, D;
	// N: string len
	// A->C
	// B->D
	string S;
	string sharp = "#";

	cin >> N >> A >> B >> C >> D >> S;
	// 0 start
	A -= 1;
	B -= 1;
	C -= 1;
	D -= 1;

	bool AcanMove = false;	
	bool BcanMove = false;
	unsigned long Anow = A;
	unsigned long Bnow = B;

	if (C < D) { // B move first
		// Move B
		while (Bnow <= D) {
			if (Bnow == D) {
				BcanMove = true;
				break;
			}
			if ( (S[Bnow + 2] != sharp) && (Bnow + 2 <= D) ) {
				Bnow += 2;
				continue;
			} else if ((S[Bnow + 1] != sharp) && (Bnow + 1 <= D) ) {
				Bnow += 1;
				continue;
			} else {
				break; // B cannot move
			}
		}

		if (!BcanMove) {
			cout << "No" << endl;
		} else { // Success B move
			// Move A
			while (Anow <= C) {
				if (Anow == C) {
					AcanMove = true;
					break;
				}
				if ( (S[Anow + 2] != sharp) && (Anow + 2 <= C) ) {
					Anow += 2;
					continue;
				} else if ((S[Anow + 1] != sharp) && (Anow + 1 <= C) ) {
					Anow += 1;
					continue;
				} else {
					break; // A cannot move
				}
			} // end whle	
		}
	} else { // D < C : A move first
		bool doita = false;
		// Move B because A cannot move 
		while (Bnow <= D) {
			if ( (S[Bnow-1] != sharp) && (S[Bnow+1] != sharp) ) {
				doita = true;
				break;
			}
			if ( (S[Bnow + 1] != sharp) && (Bnow + 1 <= D) ) {
				Bnow += 1;
				continue;
			} else if ((S[Bnow + 2] != sharp) && (Bnow + 2 <= D)) {
				Bnow += 2;
				continue;
			} else {
				break; // B cannot move
			}
		}
		if (!doita) {
			cout << "No" << endl;
		} else { // Success B move
			// Move A
			while (Anow <= C) {
				if (Anow == C) {
					AcanMove = true;
					break;
				}
				if ( (S[Anow + 2] != sharp) && (Anow + 2 != Bnow) && (Anow + 2 <= C) ) {
					Anow += 2;
					continue;
				} else if ((S[Anow + 1] != sharp) && (Anow + 1 != Bnow) && (Anow + 1 <= C) ) {
					Anow += 1;
					continue;
				} else {
					break; // A cannot move
				}
			} // end whle	

			// B move 
			while (Bnow <= D) {
				if (Bnow == D) {
					BcanMove = true;
					break;
				}
				if ( (S[Bnow + 2] != sharp) && (Bnow + 2 <= D) ) {
					Bnow += 2;
					continue;
				} else if ((S[Bnow + 1] != sharp) && (Bnow + 1 <= D) ) {
					Bnow += 1;
					continue;
				} else {
					break; // B cannot move
				}
			}
		}
	} // end A move first

	if (AcanMove && BcanMove) {
		cout << "Yes" << endl;
	}
}

Compiler output:
a.cc: In function 'int main()':
a.cc:36:43: error: no match for 'operator!=' (operand types are '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'} and 'std::string' {aka 'std::__cxx11::basic_string<char>'})
   36 |                         if ( (S[Bnow + 2] != sharp) && (Bnow + 2 <= D) ) {
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:36:46: note:   mismatched types 'const std::fpos<_StateT>' and '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'}
   36 |                         if ( (S[Bnow + 2] != sharp) && (Bnow + 2 <= D) ) {
      |                                              ^~~~~
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:36:46: note:   mismatched types 'const std::allocator<_CharT>' and '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'}
   36 |                         if ( (S[Bnow + 2] != sharp) && (Bnow + 2 <= D) ) {
      |                                              ^~~~~
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:36:46: note:   mismatched types 'const std::reverse_iterator<_Iterator>' and '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'}
   36 |                         if ( (S[Bnow + 2] != sharp) && (Bnow + 2 <= D) ) {
      |                                              ^~~~~
/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:36:46: note:   mismatched types 'const std::reverse_iterator<_Iterator>' and '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'}
   36 |                         if ( (S[Bnow + 2] != sharp) && (Bnow + 2 <= D) ) {
      |                                              ^~~~~
/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:36:46: note:   mismatched types 'const std::move_iterator<_IteratorL>' and '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'}
   36 |                         if ( (S[Bnow + 2] != sharp) && (Bnow + 2 <= D) ) {
      |                                              ^~~~~
/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:36:46: note:   mismatched types 'const std::move_iterator<_IteratorL>' and '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'}
   36 |                         if ( (S[Bnow + 2] != sharp) && (Bnow + 2 <= D) ) {
      |                                              ^~~~~
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:36:46: note:   mismatched types 'const std::pair<_T1, _T2>' and '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'}
   36 |                         if ( (S[Bnow + 2] != sharp) && (Bnow + 2 <= D) ) {
      |                                              ^~~~~
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:36:46: note:   mismatched types 'std::basic_string_view<_CharT, _Traits>' and 'char'
   36 |                         if ( (S[Bnow + 2] != sharp) && (Bnow + 2 <= D) ) {
      |                                              ^~~~~
/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:36:46: note:   mismatched types 'std::basic_string_view<_CharT, _Traits>' and 'char'
   36 |                         if ( (S[Bnow + 2] != sharp) && (Bnow + 2 <= D) ) {
      |                                              ^~~~~
/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:36:46: note:   'std::__cxx11::basic_string<char>' is not derived from 'std::basic_string_view<_CharT, _Traits>'
   36 |                         if ( (S[Bnow + 2] != sharp) && (Bnow + 2 <= D) ) {
      |                                              ^~~~~
/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:36:46: note:   mismatched types 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'}
   36 |                         if ( (S[Bnow + 2] != sharp) && (Bnow + 2 <= D) ) {
      |                                              ^~~~~
/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:36:46: note:   mismatched types 'const _CharT*' and 'char'
   36 |                         if ( (S[Bnow + 2] != sharp) && (Bnow + 2 <= D) ) {
      |                                              ^~~~~
/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:36:46: note:   mismatched types 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and '__gnu_cxx::__alloc_traits<std::allocator<char>, char>::value_type' {aka 'char'}
   36 |                         if ( (S[Bnow + 2] != sharp) && (Bnow + 2 <= D) ) {
      |                                              ^~~~~
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,
      |