Submission #302546

#	Time	Username	Problem	Language	Result	Execution time	Memory
302546		junseo	Carnival Tickets (IOI20_tickets)	C++17	27 / 100	745 ms	52984 KiB

tickets

#include "tickets.h"
#include <bits/stdc++.h>
#define fi first
#define se second
#define eb emplace_back
#define all(v) (v).begin(), (v).end()
#define rmin(r, x) r = min(r, x)
#define rmax(r, x) r = max(r, x)
#define ends ' '
#define endl '\n'
#define fastio ios_base::sync_with_stdio(0), cin.tie(0)
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int maxn = 1510;
const int maxm = 1510;

int n, m, l[maxn], r[maxn];
vector<vector<int>> ans;

long long find_maximum(int k, vector<vector<int>> x) {
	n = x.size();
	m = x[0].size();
	ans.resize(n);

	for(int i = 0; i < n; ++i) {
		ans[i].resize(m, -1);
		l[i] = 0, r[i] = m - 1;
	}

	ll ret = 0;
	vector<int> v;
	for(int i = 0; i < n; ++i)	v.eb(i);
	for(int T = 0; T < k; ++T) {
		for(int i = 0; i < n; ++i) {
			ret -= x[i][l[i]];
		}
		sort(all(v), [&](int i, int j) { return x[i][l[i]] + x[i][r[i]] > x[j][l[j]] + x[j][r[j]]; });
		for(int i = 0; i < n; ++i) {
			int j = v[i];
			if(i < n / 2) {
				ret += x[j][l[j]] + x[j][r[j]];
				ans[j][r[j]--] = T;
			}
			else {
				ans[j][l[j]++] = T;
			}
		}
	}
	
	allocate_tickets(ans);
	return ret;
}

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