Submission #412068

#	Time	Username	Problem	Language	Result	Execution time	Memory
412068		SuhaibSawalha1	Carnival Tickets (IOI20_tickets)	C++17	11 / 100	3 ms	716 KiB

tickets

#include "tickets.h"
#include <bits/stdc++.h>
using namespace std;

long long calc (vector<long long> &a) {
	int n = a.size();
	long long sum = accumulate(a.begin(), a.end(), 0LL), m = LLONG_MAX, sum2 = 0;
	sort(a.begin(), a.end());
	for (int i = 0; i < n; ++i) {
		sum -= a[i];
		m = min(m, a[i] * i - sum2 + sum - a[i] * (n - i - 1));
		sum2 += a[i];
	}
	return m;
}

long long find_maximum(int k, vector<vector<int>> a) {
	int n = a.size();
	int m = a[0].size();
	vector<vector<int>> g(n, vector<int>(m, -1));
	vector<vector<array<int, 2>>> a2(n, vector<array<int, 2>>(m));
	long long ans = 0;
	for (int i = 0; i < n; ++i) {
		for (int j = 0; j < m; ++j) {
			a2[i][j] = {a[i][j], j};
		}
		sort(a2[i].begin(), a2[i].end());
	}
	for (int i = 0; i < m; ++i) {
		vector<long long> ask;
		for (int j = 0; j < n; ++j) {
			ask.push_back(a2[j][(i + j) % m][0]);
			g[j][a2[j][(i + j) % m][1]] = i;
		}
		ans += calc(ask);
	}
	allocate_tickets(g);
	return ans;
}

• Subtask 1: 11 / 11
• Subtask 2: 0 / 16
• Subtask 3: 0 / 14
• Subtask 4: 0 / 14
• Subtask 5: 0 / 12
• Subtask 6: 0 / 23
• Subtask 7: 0 / 10