Submission #771623

#	Time	Username	Problem	Language	Result	Execution time	Memory
771623		ono_de206	Carnival Tickets (IOI20_tickets)	C++14	25 / 100	684 ms	83960 KiB

tickets

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

#define in insert
#define all(x) x.begin(),x.end()
#define pb push_back
#define eb emplace_back
#define ff first
#define ss second

// #define int long long

typedef long long ll;
typedef vector<int> vi;
typedef set<int> si;
typedef multiset<int> msi;
typedef pair<int, int> pii;
typedef vector<pii> vpii;

long long find_maximum(int k, vector<vector<int>> a) {
	int n = a.size();
	int m = a[0].size();
	vector<vector<int>> answer(n, vector<int>(m, -1));
	vector<int> l(n), r(n);
	long long ret = 0;
	vector<pair<int, int>> v;
	for(int i = 0; i < n; i++) {
		r[i] = m;
		for(int j = 0; j < m; j++) {
			v.eb(a[i][j], i);
		}
	}
	sort(all(v));
	for(int i = 0; i < n * m / 2; i++) {
		ret += v[i + n * m / 2].ff - v[i].ff;
		l[v[i].ss]++;
	}
	for(int t = 0; t < m; t++) {
		v.clear();
		for(int i = 0; i < n; i++) {
			v.eb(l[i], i);
		}
		sort(all(v));
		for(int i = n - 1; i >= n / 2; i--) {
			answer[v[i].ss][--l[v[i].ss]] = t;
		}
		for(int i = 0; i < n / 2; i++) {
			answer[v[i].ss][--r[v[i].ss]] = t;
		}
	}
	allocate_tickets(answer);
	return ret;
}

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