Submission #1018337

#	Time	Username	Problem	Language	Result	Execution time	Memory
1018337		Boas	Carnival Tickets (IOI20_tickets)	C++17	11 / 100	2 ms	860 KiB

tickets

#include "tickets.h"

#include <bits/stdc++.h>
using namespace std;
#define loop(x, i) for (int i = 0; i < (x); i++)
#define ALL(x) (x).begin(), x.end()
#define pb push_back
#define int long long
typedef pair<int, int> ii;
typedef tuple<int, int, int> iii;
typedef vector<int> vi;
typedef vector<signed> vi32;
typedef vector<bool> vb;
typedef set<int> si;
typedef vector<vi> vvi;
typedef vector<vi32> vvi32;
typedef vector<si> vsi;
typedef vector<ii> vii;
typedef set<iii> siii;

int find_maximum(signed k, vvi32 x)
{
	assert(k == 1);
	int n = x.size();
	int m = x[0].size();
	vvi32 answer(n, vi32(m, -1));
	siii opts;
	loop(n, i)
	{
		opts.insert({x[i][0], i, 0});
		opts.insert({x[i][m - 1], i, m - 1});
	}
	vi a;
	loop(n / 2, iter)
	{
		{
			auto [v, i, j] = *prev(opts.end());
			answer[i][j] = 0;
			a.pb(v);
			opts.erase({x[i][m - 1], i, m - 1});
			opts.erase({x[i][0], i, 0});
		}
		{
			auto [v, i, j] = *opts.begin();
			answer[i][j] = 0;
			a.pb(v);
			opts.erase({x[i][m - 1], i, m - 1});
			opts.erase({x[i][0], i, 0});
		}
	}
	sort(ALL(a));
	int b = a[n / 2];
	int res = 0;
	for (int v : a)
		res += abs(b - v);
	allocate_tickets(answer);
	return res;
}

• 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