Submission #366931

#	Time	Username	Problem	Language	Result	Execution time	Memory
366931		wind_reaper	Carnival Tickets (IOI20_tickets)	C++17	27 / 100	621 ms	51604 KiB

tickets

#include "tickets.h"
#include <bits/stdc++.h>

using namespace std;

long long find_maximum(int k, vector<vector<int>> x) {
	int n = x.size(); 
	int m = x[0].size();
 
	vector<vector<int>> ans(n, vector<int>(m, -1));
 
	int64_t a = 0;
 
	for(int i = 0; i < n; i++){
		for(int j = m-1; j >= m-k; --j){
			ans[i][j] = (m-1-j);
			a += int64_t(x[i][j]);
		}
	}
 
	vector<array<int64_t, 4>> b;
 
	for(int i = 0; i < n; i++){
		for(int j = 1; j <= k; j++)
			b.push_back({x[i][k-j] + x[i][m-j], i, k-j, m-j});
	}
 
	sort(b.begin(), b.end());

 	for(int i = 0; i < (n*k)/2; i++){
 		int64_t red = b[i][0];
 		int row = b[i][1], mn = b[i][2], mx = b[i][3];
 		a -= red;
 		swap(ans[row][mx], ans[row][mn]);
 	}
	allocate_tickets(ans);
	return a;
}

• 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