Language: C++

#include <bits/stdc++.h>
#define rep(i, n) for (int i = 0; i < (int)(n); i++)
using namespace std;
using ll=long long;

//エラトステネスでqのmaxまでの素数をbitsetにぶちこみ
bitset<101010> is_prime(0);

void eratos(){
int max=101010
for(int i=2;i<=max;i++)is_prime.set(i);
for(int i=2;i<=max;i++){
	if(is_prime[i]){
		for(int j=i*2;j<=n;j+=i)is_prime.reset(j);	
	}
}
}


//2017数判定おｋなら1
int is_2017(int x){
	int x1,x2;
	x1=x+1;//bit配列のインデックスに
	x2=(x+1)/2+1;
	
	if(is_prime(x1)&&is_prime(x2))return 1;
	else return 0;
	
}

//Qがデカいので正攻法だとTLE
int main() {
	int q;
	cin>>q;
	
	eratos();
	
	vector<int> s(max);
	int count=0; 
	for(int i=3;i<max;i+=2){
		if(is_prime(i))count++;
		s[i]=count;
	}
	
	rep(i,q){
		int l,r;
		cin>>l>>r;
		if(is_2017(l))cout<<s[r]-s[l]+1<<endl;
		else cout<<s[r]-s[l];
	}
	
	
	
}


Compiler output:
a.cc: In function 'void eratos()':
a.cc:11:1: error: expected ',' or ';' before 'for'
   11 | for(int i=2;i<=max;i++)is_prime.set(i);
      | ^~~
a.cc:11:13: error: 'i' was not declared in this scope
   11 | for(int i=2;i<=max;i++)is_prime.set(i);
      |             ^
a.cc:14:34: error: 'n' was not declared in this scope
   14 |                 for(int j=i*2;j<=n;j+=i)is_prime.reset(j);
      |                                  ^
a.cc: In function 'int is_2017(int)':
a.cc:26:20: error: no match for call to '(std::bitset<101010>) (int&)'
   26 |         if(is_prime(x1)&&is_prime(x2))return 1;
      |            ~~~~~~~~^~~~
a.cc:26:34: error: no match for call to '(std::bitset<101010>) (int&)'
   26 |         if(is_prime(x1)&&is_prime(x2))return 1;
      |                          ~~~~~~~~^~~~
a.cc: In function 'int main()':
a.cc:38:26: error: no matching function for call to 'std::vector<int>::vector(<unresolved overloaded function type>)'
   38 |         vector<int> s(max);
      |                          ^
In file included from /usr/include/c++/14/vector:66,
                 from /usr/include/c++/14/functional:64,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:53,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_vector.h:707:9: note: candidate: 'template<class _InputIterator, class> std::vector<_Tp, _Alloc>::vector(_InputIterator, _InputIterator, const allocator_type&) [with <template-parameter-2-2> = _InputIterator; _Tp = int; _Alloc = std::allocator<int>]'
  707 |         vector(_InputIterator __first, _InputIterator __last,
      |         ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:707:9: note:   candidate expects 2 arguments, 1 provided
/usr/include/c++/14/bits/stl_vector.h:678:7: note: candidate: 'std::vector<_Tp, _Alloc>::vector(std::initializer_list<_Tp>, const allocator_type&) [with _Tp = int; _Alloc = std::allocator<int>; allocator_type = std::allocator<int>]'
  678 |       vector(initializer_list<value_type> __l,
      |       ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:678:43: note:   no known conversion for argument 1 from '<unresolved overloaded function type>' to 'std::initializer_list<int>'
  678 |       vector(initializer_list<value_type> __l,
      |              ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~
/usr/include/c++/14/bits/stl_vector.h:659:7: note: candidate: 'std::vector<_Tp, _Alloc>::vector(std::vector<_Tp, _Alloc>&&, std::__type_identity_t<_Alloc>&) [with _Tp = int; _Alloc = std::allocator<int>; std::__type_identity_t<_Alloc> = std::allocator<int>]'
  659 |       vector(vector&& __rv, const __type_identity_t<allocator_type>& __m)
      |       ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:659:7: note:   candidate expects 2 arguments, 1 provided
/usr/include/c++/14/bits/stl_vector.h:640:7: note: candidate: 'std::vector<_Tp, _Alloc>::vector(std::vector<_Tp, _Alloc>&&, const allocator_type&, std::false_type) [with _Tp = int; _Alloc = std::allocator<int>; allocator_type = std::allocator<int>; std::false_type = std::false_type]'
  640 |       vector(vector&& __rv, const allocator_type& __m, false_type)
      |       ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:640:7: note:   candidate expects 3 arguments, 1 provided
/usr/include/c++/14/bits/stl_vector.h:635:7: note: candidate: 'std::vector<_Tp, _Alloc>::vector(std::vector<_Tp, _Alloc>&&, const allocator_type&, std::true_type) [with _Tp = int; _Alloc = std::allocator<int>; allocator_type = std::allocator<int>; std::true_type = std::true_type]'
  635 |       vector(vector&& __rv, const allocator_type& __m, true_type) noexcept
      |       ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:635:7: note:   candidate expects 3 arguments, 1 provided
/usr/include/c++/14/bits/stl_vector.h:624:7: note: candidate: 'std::vector<_Tp, _Alloc>::vector(const std::vector<_Tp, _Alloc>&, std::__type_identity_t<_Alloc>&) [with _Tp = int; _Alloc = std::allocator<int>; std::__type_identity_t<_Alloc> = std::allocator<int>]'
  624 |       vector(const vector& __x, const __type_identity_t<allocator_type>& __a)
      |       ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:624:7: note:   candidate expects 2 arguments, 1 provided
/usr/include/c++/14/bits/stl_vector.h:620:7: note: candidate: 'std::vector<_Tp, _Alloc>::vector(std::vector<_Tp, _Alloc>&&) [with _Tp = int; _Alloc = std::allocator<int>]'
  620 |       vector(vector&&) noexcept = default;
      |       ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:620:14: note:   no known conversion for argument 1 from '<unresolved overloaded function type>' to 'std::vector<int>&&'
  620 |       vector(vector&&) noexcept = default;
      |              ^~~~~~~~
/usr/include/c++/14/bits/stl_vector.h:601:7: note: candidate: 'std::vector<_Tp, _Alloc>::vector(const std::vector<_Tp, _Alloc>&) [with _Tp = int; _Alloc = std::allocator<int>]'
  601 |       vector(const vector& __x)
      |       ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:601:28: note:   no known conversion for argument 1 from '<unresolved overloaded function type>' to 'const std::vector<int>&'
  601 |       vector(const vector& __x)
      |              ~~~~~~~~~~~~~~^~~
/usr/include/c++/14/bits/stl_vector.h:569:7: note: candidate: 'std::vector<_Tp, _Alloc>::vector(size_type, const value_type&, const allocator_type&) [with _Tp = int; _Alloc = std::allocator<int>; size_type = long unsigned int; value_type = int; allocator_type = std::allocator<int>]'
  569 |       vector(size_type __n, const value_type& __value,
      |       ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:569:7: note:   candidate expects 3 arguments, 1 provided
/usr/include/c++/14/bits/stl_vector.h:556:7: note: candidate: 'std::vector<_Tp, _Alloc>::vector(size_type, const allocator_type&) [with _Tp = int; _Alloc = std::allocator<int>; size_type = long unsigned int; allocator_type = std::allocator<int>]'
  556 |       vector(size_type __n, const allocator_type& __a = allocator_type())
      |       ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:556:24: note:   no known conversion for argument 1 from '<unresolved overloaded function type>' to 'std::vector<int>::size_type' {aka 'long unsigned int'}
  556 |       vector(size_type __n, const allocator_type& __a = allocator_type())
      |              ~~~~~~~~~~^~~
/usr/include/c++/14/bits/stl_vector.h:542:7: note: candidate: 'std::vector<_Tp, _Alloc>::vector(const allocator_type&) [with _Tp = int; _Alloc = std::allocator<int>; allocator_type = std::allocator<int>]'
  542 |       vector(const allocator_type& __a) _GLIBCXX_NOEXCEPT
      |       ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:542:36: note:   no known conversion for argument 1 from '<unresolved overloaded function type>' to 'const std::vector<int>::allocator_type&' {aka 'const std::allocator<int>&'}
  542 |       vector(const allocator_type& __a) _GLIBCXX_NOEXCEPT
      |              ~~~~~~~~~~~~~~~~~~~~~~^~~
/usr/include/c++/14/bits/stl_vector.h:531:7: note: candidate: 'std::vector<_Tp, _Alloc>::vector() [with _Tp = int; _Alloc = std::allocator<int>]'
  531 |       vector() = default;
      |       ^~~~~~
/usr/include/c++/14/bits/stl_vector.h:531:7: note:   candidate expects 0 arguments, 1 provided
a.cc:40:22: error: invalid operands of types 'int' and '<unresolved overloaded function type>' to binary 'operator<'
   40 |         for(int i=3;i<max;i+=2){
      |                     ~^~~~
a.cc:41:28: error: no match for call to '(std::bitset<101010>) (int&)'
   41 |                 if(is_prime(i))count++;
      |                    ~~~~~~~~^~~
a.cc: In function 'int is_2017(int)':
a.cc:24:11: warning: control reaches end of non-void function [-Wreturn-type]
   24 |         x2=(x+1)/2+1;
      |         ~~^~~~~~~~~~