Submission #745967

#	Time	Username	Problem	Language	Result	Execution time	Memory
745967		vjudge1	Kitchen (BOI19_kitchen)	C++17	30 / 100	164 ms	220904 KiB

kitchen

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

struct meal {
	int t, k;
	bool operator<(const  meal& m)const {
		return k < m.k;
	}
};

int check(int mask, vector<int>& ch, vector<meal>& m) {
	priority_queue<meal> q;
	int sum = 0;
	for (meal i : m) {
		q.push(i);
		sum += i.t;
	}
	for (int i = 0; i < ch.size(); i++) {
		if (((1 << i)&mask) == 0)continue;
		sum -= ch[i];
		vector<meal> out;
		for (int j = 0; j < ch[i]; j++) {
			if (q.empty())break;
			meal x = q.top();
			q.pop();
			x.k--;
			out.push_back(x);
		}
		for (meal j : out)q.push(j);
	}
	if (q.top().k > 0 || sum > 0)return INT32_MAX;
	return -sum;
}

int main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(nullptr);
	int n, m, k;
	cin >> n >> m >> k;
	vector<meal> meals(n);
	bool b = 1;
	int sum = 0;
	for (int i = 0; i < n; i++) {
		cin >> meals[i].t;
		meals[i].k = k;
		if (meals[i].t < k)b = 0;
		sum += meals[i].t;
	}

	vector<int> ch(m);
	for (int& i : ch)cin >> i;

	/*	for (int i = 0; i < (1 << m); i++) {
			ans = min(ans, check(i, ch, meals));
		}*/
	vector<vector<vector<bool>>> dp(m + 1, vector<vector<bool>>(1601, vector<bool>(1601,0)));
	dp[0][0][0] = 1;
	for (int i = 0; i < m; i++) {
		for (int j = 0; j <= 1600; j++) {
			for (int k = 0; k <= 1600; k++) {
				if (dp[i][j][k]) {
					dp[i + 1][j][k] = 1;
					dp[i + 1][j + ch[i]][k + min(ch[i], n)] = 1;
				}
			}
		}
	}
	if (b) {
		for (int i = sum; i <= 1600; i++) {
			for (int j = n * k; j <= 1600; j++) {
				if (dp[m][i][j]) {
					cout << i - sum << '\n';
					return 0;
				}
			}
		}
	}
	cout << "Impossible\n";
}

Compilation message (stderr)

kitchen.cpp: In function 'int check(int, std::vector<int>&, std::vector<meal>&)':
kitchen.cpp:20:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |  for (int i = 0; i < ch.size(); i++) {
      |                  ~~^~~~~~~~~~~

• Subtask 1: 9 / 9
• Subtask 2: 0 / 22
• Subtask 3: 0 / 20
• Subtask 4: 21 / 21
• Subtask 5: 0 / 28