Language: C++

#include <bits/stdc++.h>
typedef long long int ll;
#define FOR(i, a, b) for (ll i = (signed)(a); i < (b); ++i)
#define REP(i, n) FOR(i, 0, n)
#define EREP(i, n) for (int i = (n)-1; i >= 0; --i)
#define MOD 1000000007
#define pb push_back
#define INF 93193111451418101
#define MIN -93193111451418101
#define EPS 1e-11
#define tp(a, b, c) make_tuple(a, b, c)
#define lb(a, b) lower_bound((a).begin(), (a).end(), (b))
#define ub(a, b) upper_bound((a).begin(), (a).end(), (b))
#define bitcnt(a) (ll) __builtin_popcount((a))
using namespace std;
typedef pair<ll, ll> P;
typedef tuple<ll, ll, ll> T;
typedef pair<ll, P> TP;
template <typename T> void fill_all(T &arr, const T &v) { arr = v; }
template <typename T, typename ARR> void fill_all(ARR &arr, const T &v) {
  for (auto &i : arr) {
    fill_all(i, v);
  }
}
//------------------変数-----------------------//

ll n;
//-------------------関数----------------------//
int main() {
  ll h;
  vector<ll> a, b;
  cin >> n >> h;
  REP(i, n) {
    ll c, d;
    cin >> c >> d;
    a.pb(c);
    b.pb(d);
  }
  sort(a.begin(), a.end());
  sort(b.begin(), b.end());
  vector<ll> B;
  REP(i, (signed)b.size()) {
    if (a.back() <= b[i]) {
      B.pb(b[i]);
    }
  }
  ll cntt = 0; // how many times to throw
  if (B.size()) {
    sort(B.begin(), B.end());
    EREP(i, (signed)B.size()) { // loop from back
      h -= B[i];
      cntt++;
      if (h <= 0) {
        cout << cntt << endl;
        return 0;
      }
    }
  }
  cout << h / a.back() + (h % a == 0 ? 0 : 1) + cntt << endl;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:59:29: error: no match for 'operator%' (operand types are 'll' {aka 'long long int'} and 'std::vector<long long int>')
   59 |   cout << h / a.back() + (h % a == 0 ? 0 : 1) + cntt << endl;
      |                           ~ ^ ~
      |                           |   |
      |                           |   std::vector<long long int>
      |                           ll {aka long long int}
In file included from /usr/include/c++/14/valarray:605,
                 from /usr/include/x86_64-linux-gnu/c++/14/bits/stdc++.h:166,
                 from a.cc:1:
/usr/include/c++/14/bits/valarray_after.h:409:5: note: candidate: 'template<class _Dom1, class _Dom2> std::_Expr<std::__detail::_BinClos<std::__modulus, std::_Expr, std::_Expr, _Dom1, _Dom2>, typename std::__fun<std::__modulus, typename _Dom1::value_type>::result_type> std::operator%(const _Expr<_Dom1, typename _Dom1::value_type>&, const _Expr<_Dom2, typename _Dom2::value_type>&)'
  409 |     _DEFINE_EXPR_BINARY_OPERATOR(%, struct std::__modulus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:409:5: note:   template argument deduction/substitution failed:
a.cc:59:31: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'll' {aka 'long long int'}
   59 |   cout << h / a.back() + (h % a == 0 ? 0 : 1) + cntt << endl;
      |                               ^
/usr/include/c++/14/bits/valarray_after.h:409:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__modulus, std::_Expr, std::_Constant, _Dom, typename _Dom::value_type>, typename std::__fun<std::__modulus, typename _Dom1::value_type>::result_type> std::operator%(const _Expr<_Dom1, typename _Dom1::value_type>&, const typename _Dom::value_type&)'
  409 |     _DEFINE_EXPR_BINARY_OPERATOR(%, struct std::__modulus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:409:5: note:   template argument deduction/substitution failed:
a.cc:59:31: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'll' {aka 'long long int'}
   59 |   cout << h / a.back() + (h % a == 0 ? 0 : 1) + cntt << endl;
      |                               ^
/usr/include/c++/14/bits/valarray_after.h:409:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__modulus, std::_Constant, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__modulus, typename _Dom1::value_type>::result_type> std::operator%(const typename _Dom::value_type&, const _Expr<_Dom1, typename _Dom1::value_type>&)'
  409 |     _DEFINE_EXPR_BINARY_OPERATOR(%, struct std::__modulus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:409:5: note:   template argument deduction/substitution failed:
a.cc:59:31: note:   'std::vector<long long int>' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
   59 |   cout << h / a.back() + (h % a == 0 ? 0 : 1) + cntt << endl;
      |                               ^
/usr/include/c++/14/bits/valarray_after.h:409:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__modulus, std::_Expr, std::_ValArray, _Dom, typename _Dom::value_type>, typename std::__fun<std::__modulus, typename _Dom1::value_type>::result_type> std::operator%(const _Expr<_Dom1, typename _Dom1::value_type>&, const valarray<typename _Dom::value_type>&)'
  409 |     _DEFINE_EXPR_BINARY_OPERATOR(%, struct std::__modulus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:409:5: note:   template argument deduction/substitution failed:
a.cc:59:31: note:   mismatched types 'const std::_Expr<_Dom1, typename _Dom1::value_type>' and 'll' {aka 'long long int'}
   59 |   cout << h / a.back() + (h % a == 0 ? 0 : 1) + cntt << endl;
      |                               ^
/usr/include/c++/14/bits/valarray_after.h:409:5: note: candidate: 'template<class _Dom> std::_Expr<std::__detail::_BinClos<std::__modulus, std::_ValArray, std::_Expr, typename _Dom::value_type, _Dom>, typename std::__fun<std::__modulus, typename _Dom1::value_type>::result_type> std::operator%(const valarray<typename _Dom::value_type>&, const _Expr<_Dom1, typename _Dom1::value_type>&)'
  409 |     _DEFINE_EXPR_BINARY_OPERATOR(%, struct std::__modulus)
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/valarray_after.h:409:5: note:   template argument deduction/substitution failed:
a.cc:59:31: note:   'std::vector<long long int>' is not derived from 'const std::_Expr<_Dom1, typename _Dom1::value_type>'
   59 |   cout << h / a.back() + (h % a == 0 ? 0 : 1) + cntt << endl;
      |                               ^
/usr/include/c++/14/valarray:1200:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__modulus, std::_ValArray, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__modulus, _Tp>::result_type> std::operator%(const valarray<_Tp>&, const valarray<_Tp>&)'
 1200 | _DEFINE_BINARY_OPERATOR(%, __modulus)
      | ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/valarray:1200:1: note:   template argument deduction/substitution failed:
a.cc:59:31: note:   mismatched types 'const std::valarray<_Tp>' and 'll' {aka 'long long int'}
   59 |   cout << h / a.back() + (h % a == 0 ? 0 : 1) + cntt << endl;
      |                               ^
/usr/include/c++/14/valarray:1200:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__modulus, std::_ValArray, std::_Constant, _Tp, _Tp>, typename std::__fun<std::__modulus, _Tp>::result_type> std::operator%(const valarray<_Tp>&, const typename valarray<_Tp>::value_type&)'
 1200 | _DEFINE_BINARY_OPERATOR(%, __modulus)
      | ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/valarray:1200:1: note:   template argument deduction/substitution failed:
a.cc:59:31: note:   mismatched types 'const std::valarray<_Tp>' and 'll' {aka 'long long int'}
   59 |   cout << h / a.back() + (h % a == 0 ? 0 : 1) + cntt << endl;
      |                               ^
/usr/include/c++/14/valarray:1200:1: note: candidate: 'template<class _Tp> std::_Expr<std::__detail::_BinClos<std::__modulus, std::_Constant, std::_ValArray, _Tp, _Tp>, typename std::__fun<std::__modulus, _Tp>::result_type> std::operator%(const typename valarray<_Tp>::value_type&, const valarray<_Tp>&)'
 1200 | _DEFINE_BINARY_OPERATOR(%, __modulus)
      | ^~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/valarray:1200:1: note:   template argument deduction/substitution failed:
a.cc:59:31: note:   'std::vector<long long int>' is not derived from 'const std::valarray<_Tp>'
   59 |   cout << h / a.back() + (h % a == 0 ? 0 : 1) + cntt << endl;
      |                               ^