Language: C++

#include <iostream>
#include <algorithm>
#include <vector>
#include <queue>
#include <set>
#include <unordered_map>
#include <iomanip>
#include <cmath>
#include <tuple>
using namespace std;
using ll = long long;
#define rep(i, j, n) for(int i = j; i < (int)n; ++i)
#define rrep(i, j, n) for(int i = (int)n - 1; j <= i; --i)

constexpr ll MOD = 0x3b9aca07;
constexpr int INF = 0x3f3f3f3f;
constexpr ll INFL = 0x3f3f3f3f3f3f3f3fLL;

ll dp[99][300];
unordered_map<tuple<ll, ll, ll>, bool> used;

int main() {
	cin.tie(0);
	ios_base::sync_with_stdio(0);

	ll n, k; cin >> n;
	vector<ll> a(n); rep(i, 0, n) cin >> a[i];
	// 80000
	queue < tuple<ll, ll, ll>> q;
	ll ans = 0;
	q.emplace(0, 0, 1000);
	while (q.size()) {
		ll i, j, k;
		tie(i, j, k) = q.front();
		q.pop();
		if (i == n) {
			ans = max(ans, k);
			continue;
		}
		if (j > 0) {
			if (!used[{ i + 1, 0, k + a[i] * j }]) {
				q.emplace(i + 1, 0, k + a[i] * j);
				used[{i + 1, 0, k + a[i] * j }] = true;
			}
		}
		if (!used[{ i + 1, j, k }]) {
			q.emplace(i + 1, j, k);
			used[{ i + 1, j, k }] = true;
		}

		ll num = k / a[i];
		if (!used[{ i + 1, j + num, k - num * a[i] }]) {
			q.emplace(i + 1, j + num, k - num * a[i]);
			used[{i + 1, j + num, k - num * a[i]}] = true;
		}
	}
	cout << ans << endl;

	return 0;
}


Compiler output:
a.cc:20:40: error: use of deleted function 'std::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::unordered_map() [with _Key = std::tuple<long long int, long long int, long long int>; _Tp = bool; _Hash = std::hash<std::tuple<long long int, long long int, long long int> >; _Pred = std::equal_to<std::tuple<long long int, long long int, long long int> >; _Alloc = std::allocator<std::pair<const std::tuple<long long int, long long int, long long int>, bool> >]'
   20 | unordered_map<tuple<ll, ll, ll>, bool> used;
      |                                        ^~~~
In file included from /usr/include/c++/14/unordered_map:41,
                 from a.cc:6:
/usr/include/c++/14/bits/unordered_map.h:148:7: note: 'std::unordered_map<_Key, _Tp, _Hash, _Pred, _Alloc>::unordered_map() [with _Key = std::tuple<long long int, long long int, long long int>; _Tp = bool; _Hash = std::hash<std::tuple<long long int, long long int, long long int> >; _Pred = std::equal_to<std::tuple<long long int, long long int, long long int> >; _Alloc = std::allocator<std::pair<const std::tuple<long long int, long long int, long long int>, bool> >]' is implicitly deleted because the default definition would be ill-formed:
  148 |       unordered_map() = default;
      |       ^~~~~~~~~~~~~
/usr/include/c++/14/bits/unordered_map.h:148:7: error: use of deleted function 'std::_Hashtable<_Key, _Value, _Alloc, _ExtractKey, _Equal, _Hash, _RangeHash, _Unused, _RehashPolicy, _Traits>::_Hashtable() [with _Key = std::tuple<long long int, long long int, long long int>; _Value = std::pair<const std::tuple<long long int, long long int, long long int>, bool>; _Alloc = std::allocator<std::pair<const std::tuple<long long int, long long int, long long int>, bool> >; _ExtractKey = std::__detail::_Select1st; _Equal = std::equal_to<std::tuple<long long int, long long int, long long int> >; _Hash = std::hash<std::tuple<long long int, long long int, long long int> >; _RangeHash = std::__detail::_Mod_range_hashing; _Unused = std::__detail::_Default_ranged_hash; _RehashPolicy = std::__detail::_Prime_rehash_policy; _Traits = std::__detail::_Hashtable_traits<true, false, true>]'
In file included from /usr/include/c++/14/bits/unordered_map.h:33:
/usr/include/c++/14/bits/hashtable.h:539:7: note: 'std::_Hashtable<_Key, _Value, _Alloc, _ExtractKey, _Equal, _Hash, _RangeHash, _Unused, _RehashPolicy, _Traits>::_Hashtable() [with _Key = std::tuple<long long int, long long int, long long int>; _Value = std::pair<const std::tuple<long long int, long long int, long long int>, bool>; _Alloc = std::allocator<std::pair<const std::tuple<long long int, long long int, long long int>, bool> >; _ExtractKey = std::__detail::_Select1st; _Equal = std::equal_to<std::tuple<long long int, long long int, long long int> >; _Hash = std::hash<std::tuple<long long int, long long int, long long int> >; _RangeHash = std::__detail::_Mod_range_hashing; _Unused = std::__detail::_Default_ranged_hash; _RehashPolicy = std::__detail::_Prime_rehash_policy; _Traits = std::__detail::_Hashtable_traits<true, false, true>]' is implicitly deleted because the default definition would be ill-formed:
  539 |       _Hashtable() = default;
      |       ^~~~~~~~~~
/usr/include/c++/14/bits/hashtable.h:539:7: error: use of deleted function 'std::__detail::_Hashtable_base<_Key, _Value, _ExtractKey, _Equal, _Hash, _RangeHash, _Unused, _Traits>::_Hashtable_base() [with _Key = std::tuple<long long int, long long int, long long int>; _Value = std::pair<const std::tuple<long long int, long long int, long long int>, bool>; _ExtractKey = std::__detail::_Select1st; _Equal = std::equal_to<std::tuple<long long int, long long int, long long int> >; _Hash = std::hash<std::tuple<long long int, long long int, long long int> >; _RangeHash = std::__detail::_Mod_range_hashing; _Unused = std::__detail::_Default_ranged_hash; _Traits = std::__detail::_Hashtable_traits<true, false, true>]'
In file included from /usr/include/c++/14/bits/hashtable.h:35:
/usr/include/c++/14/bits/hashtable_policy.h:1731:7: note: 'std::__detail::_Hashtable_base<_Key, _Value, _ExtractKey, _Equal, _Hash, _RangeHash, _Unused, _Traits>::_Hashtable_base() [with _Key = std::tuple<long long int, long long int, long long int>; _Value = std::pair<const std::tuple<long long int, long long int, long long int>, bool>; _ExtractKey = std::__detail::_Select1st; _Equal = std::equal_to<std::tuple<long long int, long long int, long long int> >; _Hash = std::hash<std::tuple<long long int, long long int, long long int> >; _RangeHash = std::__detail::_Mod_range_hashing; _Unused = std::__detail::_Default_ranged_hash; _Traits = std::__detail::_Hashtable_traits<true, false, true>]' is implicitly deleted because the default definition would be ill-formed:
 1731 |       _Hashtable_base() = default;
      |       ^~~~~~~~~~~~~~~
/usr/include/c++/14/bits/hashtable_policy.h:1731:7: error: use of deleted function 'std::__detail::_Hash_code_base<_Key, _Value, _ExtractKey, _Hash, _RangeHash, _Unused, __cache_hash_code>::_Hash_code_base() [with _Key = std::tuple<long long int, long long int, long long int>; _Value = std::pair<const std::tuple<long long int, long long int, long long int>, bool>; _ExtractKey = std::__detail::_Select1st; _Hash = std::hash<std::tuple<long long int, long long int, long long int> >; _RangeHash = std::__detail::_Mod_range_hashing; _Unused = std::__detail::_Default_ranged_hash; bool __cache_hash_code = true]'
/usr/include/c++/14/bits/hashtable_policy.h: In instantiation of 'std::__detail::_Hashtable_ebo_helper<_Nm, _Tp, true>::_Hashtable_ebo_helper() [with int _Nm = 1; _Tp = std::hash<std::tuple<long long int, long long int, long long int> >]':
/usr/include/c++/14/bits/hashtable_policy.h:1328:7:   required from here
 1328 |       _Hash_code_base() = default;
      |       ^~~~~~~~~~~~~~~
/usr/include/c++/14/bits/hashtable_policy.h:1245:49: error: use of deleted function 'std::hash<std::tuple<long long int, long long int, long long int> >::hash()'
 1245 |       _Hashtable_ebo_helper() noexcept(noexcept(_Tp())) : _Tp() { }
      |                                                 ^~~~~
In file included from /usr/include/c++/14/string_view:50,
                 from /usr/include/c++/14/bits/basic_string.h:47,
                 from /usr/include/c++/14/string:54,
                 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/functional_hash.h:102:12: note: 'std::hash<std::tuple<long long int, long long int, long long int> >::hash()' is implicitly deleted because the default definition would be ill-formed:
  102 |     struct hash : __hash_enum<_Tp>
      |            ^~~~
/usr/include/c++/14/bits/functional_hash.h:102:12: error: no matching function for call to 'std::__hash_enum<std::tuple<long long int, long long int, long long int>, false>::__hash_enum()'
/usr/include/c++/14/bits/functional_hash.h:83:7: note: candidate: 'std::__hash_enum<_Tp, <anonymous> >::__hash_enum(std::__hash_enum<_Tp, <anonymous> >&&) [with _Tp = std::tuple<long long int, long long int, long long int>; bool <anonymous> = false]'
   83 |       __hash_enum(__hash_enum&&);
      |       ^~~~~~~~~~~
/usr/include/c++/14/bits/functional_hash.h:83:7: note:   candidate expects 1 argument, 0 provided
/usr/include/c++/14/bits/functional_hash.h:102:12: error: 'std::__hash_enum<_Tp, <anonymous> >::~__hash_enum() [with _Tp = std::tuple<long long int, long long int, long long int>; bool <anonymous> = false]' is private within this context
  102 |     struct hash : __hash_enum<_Tp>
      |            ^~~~
/usr/include/c++/14/bits/functional_hash.h:84:7: note: declared private here
   84 |       ~__hash_enum();
      |       ^
/usr/include/c++/14/bits/hashtable_policy.h:1245:49: note: use '-fdiagnostics-all-candidates' to display considered candidates
 1245 |       _Hashtable_ebo_helper() noexcept(noexcept(_Tp())) : _Tp() { }
      |                                                 ^~~~~
/usr/include/c++/14/bits/hashtable_policy.h:1328:7: note: 'std::__detail::_Hash_code_base<_Key, _Value, _ExtractKey, _Hash, _RangeHash, _Unused, __cache_hash_code>::_Hash_code_base() [with _Key = std::tuple<long long int, long long int, long long int>; _Value = std::pair<const std::tuple<long long int, long long int, long long int>, bool>; _ExtractKey = std::__detail::_Select1st; _Hash = std::hash<std::tuple<long long int, long long int, long long int> >; _RangeHash = std::__detail::_Mod_range_hashing; _Unused = std::__detail::_Default_ranged_hash; bool __cache_hash_code = true]' is implicitly deleted because the default definition would be ill-formed:
 1328 |       _Hash_code_base() = default;
      |       ^~~~~~~~~~~~~~~
/usr/include/c++/14/bits/hashtable_policy.h:1328:7: error: use of deleted function 'std::__detail::_Hashtable_ebo_helper<1, std::hash<std::tuple<long long int, long long int, long long int> >, true>::~_Hashtable_ebo_helper()'
/usr/include/c++/14/bits/hashtable_policy.h:1242:12: note: 'std::__detail::_Hashtable_ebo_helper<1, std::hash<std::tuple<long long int, long long int, long long int> >, true>::~_Hashtable_ebo_helper()' is implicitly deleted because the default definition would be ill-formed:
 1242 |     struct _Hashtable_ebo_helper<_Nm, _Tp, true>
      |            ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/usr/include/c++/14/bits/hashtable_policy.h:1242:12: error: use of deleted function 'std::hash<std::tuple<long long int, long long int, long long int> >::~hash()'
/usr/include/c++/14/bits/functional_hash.h:102:12: note: 'std::hash<std::tuple<long long int, long long int, long long int> >::~hash()' is implicitly deleted because the default definition would be ill-formed:
  102 |     struct hash : __hash_enum<_Tp>
      |            ^~~~
/usr/include/c++/14/bits/functional_hash.h:102:12: error: 'std::__hash_enum<_Tp, <anonymous> >::~__hash_enum() [with _Tp = std::tuple<long long int, long long int, long long int>; bool <anonymous> = false]' is private within this context
/usr/includ