Language: C++

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

int main(){
	int n, h;
	int count = 0;
	cin >> n >> h;
	vector<int> a(n), b(n);
	for(int i = 0; i < n; i++){
		cin >> a[i] >> b[i];
	}
	sort(a.begin(), a.end());
	sort(b.begin(), b.end());
	auto itr = b.back();
	while(h > 0 && *itr > a.back() && itr >= b.begin()){
		h -= *itr;
		count++;
		itr--;
	}
	if(h>0){
		count += (h + a.back() - 1) / a.back();
	}
	cout << count;
	return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:17:24: error: invalid type argument of unary '*' (have 'int')
   17 |         while(h > 0 && *itr > a.back() && itr >= b.begin()){
      |                        ^~~~
a.cc:17:47: error: no match for 'operator>=' (operand types are 'int' and 'std::vector<int>::iterator')
   17 |         while(h > 0 && *itr > a.back() && itr >= b.begin()){
      |                                           ~~~ ^~ ~~~~~~~~~
      |                                           |             |
      |                                           int           std::vector<int>::iterator
In file included from /usr/include/c++/14/string:48,
                 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,
                 from /usr/include/c++/14/ostream:40,
                 from /usr/include/c++/14/iostream:41,
                 from a.cc:1:
/usr/include/c++/14/bits/stl_iterator.h:476:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator>=(const reverse_iterator<_Iterator>&, const reverse_iterator<_Iterator>&)'
  476 |     operator>=(const reverse_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:476:5: note:   template argument deduction/substitution failed:
a.cc:17:58: note:   mismatched types 'const std::reverse_iterator<_Iterator>' and 'int'
   17 |         while(h > 0 && *itr > a.back() && itr >= b.begin()){
      |                                                          ^
/usr/include/c++/14/bits/stl_iterator.h:520:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator>=(const reverse_iterator<_Iterator>&, const reverse_iterator<_IteratorR>&)'
  520 |     operator>=(const reverse_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:520:5: note:   template argument deduction/substitution failed:
a.cc:17:58: note:   mismatched types 'const std::reverse_iterator<_Iterator>' and 'int'
   17 |         while(h > 0 && *itr > a.back() && itr >= b.begin()){
      |                                                          ^
/usr/include/c++/14/bits/stl_iterator.h:1724:5: note: candidate: 'template<class _IteratorL, class _IteratorR> constexpr bool std::operator>=(const move_iterator<_IteratorL>&, const move_iterator<_IteratorR>&)'
 1724 |     operator>=(const move_iterator<_IteratorL>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1724:5: note:   template argument deduction/substitution failed:
a.cc:17:58: note:   mismatched types 'const std::move_iterator<_IteratorL>' and 'int'
   17 |         while(h > 0 && *itr > a.back() && itr >= b.begin()){
      |                                                          ^
/usr/include/c++/14/bits/stl_iterator.h:1781:5: note: candidate: 'template<class _Iterator> constexpr bool std::operator>=(const move_iterator<_IteratorL>&, const move_iterator<_IteratorL>&)'
 1781 |     operator>=(const move_iterator<_Iterator>& __x,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1781:5: note:   template argument deduction/substitution failed:
a.cc:17:58: note:   mismatched types 'const std::move_iterator<_IteratorL>' and 'int'
   17 |         while(h > 0 && *itr > a.back() && itr >= b.begin()){
      |                                                          ^
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:1070:5: note: candidate: 'template<class _T1, class _T2> constexpr bool std::operator>=(const pair<_T1, _T2>&, const pair<_T1, _T2>&)'
 1070 |     operator>=(const pair<_T1, _T2>& __x, const pair<_T1, _T2>& __y)
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_pair.h:1070:5: note:   template argument deduction/substitution failed:
a.cc:17:58: note:   mismatched types 'const std::pair<_T1, _T2>' and 'int'
   17 |         while(h > 0 && *itr > a.back() && itr >= b.begin()){
      |                                                          ^
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:739:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator>=(basic_string_view<_CharT, _Traits>, basic_string_view<_CharT, _Traits>)'
  739 |     operator>=(basic_string_view<_CharT, _Traits> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:739:5: note:   template argument deduction/substitution failed:
a.cc:17:58: note:   mismatched types 'std::basic_string_view<_CharT, _Traits>' and 'int'
   17 |         while(h > 0 && *itr > a.back() && itr >= b.begin()){
      |                                                          ^
/usr/include/c++/14/string_view:746:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator>=(basic_string_view<_CharT, _Traits>, __type_identity_t<basic_string_view<_CharT, _Traits> >)'
  746 |     operator>=(basic_string_view<_CharT, _Traits> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:746:5: note:   template argument deduction/substitution failed:
a.cc:17:58: note:   mismatched types 'std::basic_string_view<_CharT, _Traits>' and 'int'
   17 |         while(h > 0 && *itr > a.back() && itr >= b.begin()){
      |                                                          ^
/usr/include/c++/14/string_view:754:5: note: candidate: 'template<class _CharT, class _Traits> constexpr bool std::operator>=(__type_identity_t<basic_string_view<_CharT, _Traits> >, basic_string_view<_CharT, _Traits>)'
  754 |     operator>=(__type_identity_t<basic_string_view<_CharT, _Traits>> __x,
      |     ^~~~~~~~
/usr/include/c++/14/string_view:754:5: note:   template argument deduction/substitution failed:
a.cc:17:58: note:   '__gnu_cxx::__normal_iterator<int*, std::vector<int> >' is not derived from 'std::basic_string_view<_CharT, _Traits>'
   17 |         while(h > 0 && *itr > a.back() && itr >= b.begin()){
      |                                                          ^
/usr/include/c++/14/bits/basic_string.h:3997:5: 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>&)'
 3997 |     operator>=(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:3997:5: note:   template argument deduction/substitution failed:
a.cc:17:58: note:   mismatched types 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'int'
   17 |         while(h > 0 && *itr > a.back() && itr >= b.begin()){
      |                                                          ^
/usr/include/c++/14/bits/basic_string.h:4011:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator>=(const __cxx11::basic_string<_CharT, _Traits, _Allocator>&, const _CharT*)'
 4011 |     operator>=(const basic_string<_CharT, _Traits, _Alloc>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:4011:5: note:   template argument deduction/substitution failed:
a.cc:17:58: note:   mismatched types 'const std::__cxx11::basic_string<_CharT, _Traits, _Allocator>' and 'int'
   17 |         while(h > 0 && *itr > a.back() && itr >= b.begin()){
      |                                                          ^
/usr/include/c++/14/bits/basic_string.h:4024:5: note: candidate: 'template<class _CharT, class _Traits, class _Alloc> bool std::operator>=(const _CharT*, const __cxx11::basic_string<_CharT, _Traits, _Allocator>&)'
 4024 |     operator>=(const _CharT* __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/basic_string.h:4024:5: note:   template argument deduction/substitution failed:
a.cc:17:58: note:   mismatched types 'const _CharT*' and 'int'
   17 |         while(h > 0 && *itr > a.back() && itr >= b.begin()){
      |                                                          ^
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:2631:5: note: candidate: 'template<class ... _TElements, class ... _UElements> constexpr bool std::operator>=(const tuple<_UTypes ...>&, const tuple<_Elements ...>&)'
 2631 |     operator>=(const tuple<_TElements...>& __t,
      |     ^~~~~~~~
/usr/include/c++/14/tuple:2631:5: note:   template argument deduction/substitution failed:
a.cc:17:58: note:   mismatched types 'const std::tuple<_UTypes ...>' and 'int'
   17 |         while(h > 0 && *itr > a.back() && itr >= b.begin()){
      |                                                          ^
In file included from /usr/include/c++/14/vector:66,
                 from a.cc:2:
/usr/include/c++/14/bits/stl_vector.h:2114:5: note: candidate: 'template<class _Tp, class _Alloc> bool std::operator>=(const vector<_Tp, _Alloc>&, const vector<_Tp, _Alloc>&)'
 2114 |     operator>=(const vector<_Tp, _Alloc>& __x, const vector<_Tp, _Alloc>& __y)
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_vector.h:2114:5: note:   template argument deduction/substitution failed:
a.cc:17:58: note:   mismatched types 'const std::vector<_Tp, _Alloc>' and 'int'
   17 |         while(h > 0 && *itr > a.back() && itr >= b.begin()){
      |                                                          ^
/usr/include/c++/14/bits/stl_iterator.h:1289:5: note: candidate: 'template<class _IteratorL, class _IteratorR, class _Container> bool __gnu_cxx::operator>=(const __normal_iterator<_IteratorL, _Container>&, const __normal_iterator<_IteratorR, _Container>&)'
 1289 |     operator>=(const __normal_iterator<_IteratorL, _Container>& __lhs,
      |     ^~~~~~~~
/usr/include/c++/14/bits/stl_iterator.h:1289:5: note:   template argument deduction/substitution failed:
a.cc:17:58: note:   mismatched types 'const __gnu_cxx::__normal_iterator<_IteratorL, _Container>' and 'int'
   17 |         while(h > 0 && *itr > a.back() && itr >= b.begin()){
      |                                                          ^
/usr/include/c++/14/bits/stl_iter