Submission #1039773

#	Time	Username	Problem	Language	Result	Execution time	Memory
1039773		parsadox2	Carnival Tickets (IOI20_tickets)	C++17	100 / 100	565 ms	72324 KiB

tickets

#include "tickets.h"
#include <bits/stdc++.h>
#define F first
#define S second
using namespace std;

const int N = 15e2 + 10;
int n , m , suf[N] , prf[N];
vector<vector<int>> a , answer;

long long find_maximum(int k, vector<vector<int>> x) {
	a = x;
	n = x.size();
	m = x[0].size();
	long long ans = 0;
	vector <pair<int, int>> all;
	for(int i = 0 ; i < n ; i++)  
	{
		prf[i] = k;
		for(int j = 0 ; j < k ; j++)
		{
			all.push_back(make_pair(a[i][m - 1 - j] + a[i][k - 1 - j] , i));
			ans -= a[i][j];
			//cout << "WTF- " << a[i][j] << endl;
		}
	}
	//cout << ans << endl;
	sort(all.rbegin() , all.rend());
	for(int i = 0 ; i < n * k / 2 ; i++)
	{
		ans += all[i].F;
		suf[all[i].S]++;
		prf[all[i].S]--;
		//cout << "WTF+ " << all[i].F << " " << all[i].S << endl;
	}
	//cout << ans << endl;
	for (int i = 0; i < n; i++) {
		vector<int> row(m , -1);
		answer.push_back(row);
	}
	int num = 0;
	for(int i = 0 ; i < n ; i++)  for(int j = 0 ; j < prf[i] ; j++)
	{
		answer[i][j] = num;
		num++;
		num %= k;
	}
	for(int i = n - 1 ; i >= 0 ; i--)  for(int j = 0 ; j < suf[i] ; j++)
	{
		answer[i][m - 1 - j] = num;
		num++;
		num %= k;
	}
	allocate_tickets(answer);
	return ans;
}

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