Submission #819878

#	Time	Username	Problem	Language	Result	Execution time	Memory
819878		nstefan	Cloud Computing (CEOI18_clo)	C++17	72 / 100	574 ms	1788 KiB

clo

#include <algorithm>
#include <iostream>
#include <vector>

using std::cout;
using std::endl;
using std::vector;

struct Transaction {
	int cores;
	int rate;
	int price;
};

int main() {
	vector<Transaction> poss_transactions;
	int max_computers = 0;
	int comp_num;
	std::cin >> comp_num;
	for (int c = 0; c < comp_num; c++) {
		Transaction trans;
		std::cin >> trans.cores >> trans.rate >> trans.price;
		trans.price = -trans.price;
		poss_transactions.push_back(trans);
		max_computers += trans.cores;
	}
	int order_num;
	std::cin >> order_num;
	for (int o = 0; o < order_num; o++) {
		Transaction trans;
		std::cin >> trans.cores >> trans.rate >> trans.price;
		trans.cores = -trans.cores;
		poss_transactions.push_back(trans);
	}
	/*
	 * if we sort like this, then the entire clock rate issue
	 * goes away as long as we process them in order
	 */
	std::sort(poss_transactions.begin(), poss_transactions.end(),
	          [](const Transaction &a, const Transaction &b) -> bool {
		          return a.rate > b.rate ;
	          });

	/*
	 * max_profits[t][c] = the maximum profit we can gain from the first
	 * t transactions given that we have c cores left
	 */
	vector<long long> max_profits(max_computers + 1, INT64_MIN);
	max_profits[0] = 0;
	for (const Transaction &t : poss_transactions) {
		vector<long long> new_max(max_profits);
		for (int c = 0; c <= max_computers; c++) {
			int prev_comp = c - t.cores;
			if (0 <= prev_comp && prev_comp <= max_computers &&
			    max_profits[prev_comp] != INT64_MIN) {
				new_max[c] =
				    std::max(new_max[c], max_profits[prev_comp] + t.price);
			}
		}
		max_profits = new_max;
	}
	cout << *std::max_element(max_profits.begin(), max_profits.end()) << endl;
}

• Subtask 1: 18 / 18
• Subtask 2: 18 / 18
• Subtask 3: 18 / 18
• Subtask 4: 0 / 18
• Subtask 5: 18 / 18
• Subtask 6: 0 / 10