Language: C++

#include <bits/stdc++.h>
using namespacestd;

main(){
int N, count_1yen , remains;

cin >> N >> count_1yen ;

if(N / 500 => 0){
	remains = N / 500 ;
	if( remains < count_1yen ) {
		cout << "Yes" << endl;
		}else{
		cout << "No" << endl;
		}
	}else {
		if( N < count_1yen ){
		cout << "Yes" << endl;
		}else{
		cout << "No" << endl;
	}
}

Compiler output:
a.cc:2:7: error: expected nested-name-specifier before 'namespacestd'
    2 | using namespacestd;
      |       ^~~~~~~~~~~~
a.cc:4:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
    4 | main(){
      | ^~~~
a.cc: In function 'int main()':
a.cc:7:1: error: 'cin' was not declared in this scope; did you mean 'std::cin'?
    7 | cin >> N >> count_1yen ;
      | ^~~
      | std::cin
In file included from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:146,
                 from a.cc:1:
/usr/include/c++/14/iostream:62:18: note: 'std::cin' declared here
   62 |   extern istream cin;           ///< Linked to standard input
      |                  ^~~
a.cc:9:13: error: expected primary-expression before '>' token
    9 | if(N / 500 => 0){
      |             ^
a.cc:12:17: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   12 |                 cout << "Yes" << endl;
      |                 ^~~~
      |                 std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:12:34: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   12 |                 cout << "Yes" << endl;
      |                                  ^~~~
      |                                  std::endl
In file included from /usr/include/c++/14/istream:41,
                 from /usr/include/c++/14/sstream:40,
                 from /usr/include/c++/14/complex:45,
                 from /usr/include/c++/14/ccomplex:39,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:127:
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
a.cc:14:17: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   14 |                 cout << "No" << endl;
      |                 ^~~~
      |                 std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:14:33: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   14 |                 cout << "No" << endl;
      |                                 ^~~~
      |                                 std::endl
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
a.cc:18:17: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   18 |                 cout << "Yes" << endl;
      |                 ^~~~
      |                 std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:18:34: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   18 |                 cout << "Yes" << endl;
      |                                  ^~~~
      |                                  std::endl
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
a.cc:20:17: error: 'cout' was not declared in this scope; did you mean 'std::cout'?
   20 |                 cout << "No" << endl;
      |                 ^~~~
      |                 std::cout
/usr/include/c++/14/iostream:63:18: note: 'std::cout' declared here
   63 |   extern ostream cout;          ///< Linked to standard output
      |                  ^~~~
a.cc:20:33: error: 'endl' was not declared in this scope; did you mean 'std::endl'?
   20 |                 cout << "No" << endl;
      |                                 ^~~~
      |                                 std::endl
/usr/include/c++/14/ostream:744:5: note: 'std::endl' declared here
  744 |     endl(basic_ostream<_CharT, _Traits>& __os)
      |     ^~~~
a.cc:22:2: error: expected '}' at end of input
   22 | }
      |  ^
a.cc:4:7: note: to match this '{'
    4 | main(){
      |       ^