Submission #947626

#	Time	Username	Problem	Language	Result	Execution time	Memory
947626		marvinthang	Cookies (JOI23_cookies)	C++17	100 / 100	196 ms	207468 KiB

cookies

/*************************************
*    author: marvinthang             *
*    created: 16.03.2024 22:48:39    *
*************************************/

#include <bits/stdc++.h>

using namespace std;

#define fi first
#define se second
#define left ___left
#define right ___right
#define TIME (1.0 * clock() / CLOCK_PERS_SEC)
#define MASK(i) (1LL << (i))
#define BIT(x, i) ((x) >> (i) & 1)
#define __builtin_popcount __builtin_popcountll
#define ALL(v) (v).begin(), (v).end()
#define REP(i, n) for (int i = 0, _n = (n); i < _n; ++i)
#define REPD(i, n) for (int i = (n); i-- > 0; )
#define FOR(i, a, b) for (int i = (a), _b = (b); i < _b; ++i)
#define FORD(i, b, a) for (int i = (b), _a = (a); i-- > _a; )
#define FORE(i, a, b) for (int i = (a), _b = (b); i <= _b; ++i)
#define FORDE(i, b, a) for (int i = (b), _a = (a); i >= _a; --i)
#define scan_op(...) istream & operator >> (istream &in, __VA_ARGS__ &u)
#define print_op(...) ostream & operator << (ostream &out, const __VA_ARGS__ &u) 
#define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
template <class U, class V> scan_op(pair <U, V>) { return in >> u.fi >> u.se; };
template <class T> scan_op(vector <T>) { for (T &x: u) in >> x; return in; }
template <class U, class V> print_op(pair <U, V>) { return out << '(' << u.fi << ", " << u.se << ')'; }
template <size_t i, class T> ostream &print_tuple_utils(ostream &out, const T &tup) { if constexpr(i == tuple_size<T>::value) return out << ')'; else return print_tuple_utils<i + 1, T>(out << (i ? ", "  : "(") << get<i>(tup), tup); }
template <class ...U> print_op(tuple <U...>) { return print_tuple_utils<0, tuple <U...>>(out, u); }
template <class Con, class = decltype(begin(declval<Con>()))> typename enable_if <!is_same<Con, string>::value, ostream &>::type operator << (ostream &out, const Con &con) {
	out << '{';
	for (auto it = con.begin(); it != con.end(); ++it) out << (it == con.begin() ? "" : ", ") << *it;
	return out << '}';
}

const int MAX = 15005;
#define Bitset bitset <MAX>

void process(void) {
	int n; cin >> n;
	vector <int> a(n); cin >> a;
	int m; cin >> m;
	vector <int> b(m); cin >> b;
	reverse(ALL(b));
	vector <int> c(a);
	sort(ALL(c));
	int sum = accumulate(ALL(a), 0);
	vector <int> max_cap(sum + 1);
	int j = 0, cur = 0;
	max_cap[0] = n;
	FORE(i, 1, sum) {
		while (j < n && c[j] < i) cur += c[j++];
		max_cap[i] = cur + (n - j) * i;
	}
	vector <vector <Bitset>> dp(m);
	Bitset all; all.set();
	REP(i, m) dp[i].resize(sum / b[i] + 1);
	dp[0][0][0] = 1;
	REP(i, m) {
		int sz = sum / b[i] + 1;
		REP(j, sz) {
			dp[i][j] &= all >> (MAX - max_cap[j] - 1);
			if (i + 1 < m) dp[i + 1][j] |= dp[i][j];
			if (j + 1 < sz) dp[i][j + 1] |= dp[i][j] << b[i];
		}
	}
	int mi = -1;
	REP(j, dp[m - 1].size()) if (dp[m - 1][j][sum]) {
		mi = j;
		break;
	}
	cout << mi << '\n';
	if (mi == -1) return;
	int k = sum;
	vector <int> boxes;
	REPD(i, m) {
		while (k >= b[i] && mi && dp[i][mi - 1][k - b[i]]) {
			boxes.push_back(b[i]);
			--mi;
			k -= b[i];
		}
	}
	priority_queue <pair <int, int>> pq;
	REP(i, n) pq.emplace(a[i], i);
	for (int sz: boxes) {
		vector <int> v;
		REP(love, sz) {
			v.push_back(pq.top().se);
			pq.pop();
		}
		cout << sz;
		for (int i: v) {
			cout << ' ' << i + 1;
			pq.emplace(--a[i], i);
		}
		cout << '\n';
	}
}

int main(void) {
	ios_base::sync_with_stdio(false); cin.tie(nullptr);
	file("cookies");
	process();
	return (0 ^ 0);
}

Compilation message (stderr)

cookies.cpp: In function 'int main()':
cookies.cpp:27:57: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 | #define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
      |                                                  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
cookies.cpp:105:2: note: in expansion of macro 'file'
  105 |  file("cookies");
      |  ^~~~
cookies.cpp:27:90: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 | #define file(name) if (fopen(name".inp", "r")) { freopen(name".inp", "r", stdin); freopen(name".out", "w", stdout); }
      |                                                                                   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
cookies.cpp:105:2: note: in expansion of macro 'file'
  105 |  file("cookies");
      |  ^~~~

• Subtask 1: 6 / 6
• Subtask 2: 7 / 7
• Subtask 3: 12 / 12
• Subtask 4: 45 / 45
• Subtask 5: 15 / 15
• Subtask 6: 15 / 15