Submission #771650

#	Time	Username	Problem	Language	Result	Execution time	Memory
771650		ono_de206	Carnival Tickets (IOI20_tickets)	C++14	0 / 100	380 ms	52688 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);
	for(int i = 0; i < n; i++) {
		for(int j = 0; j < m; j++) {
			l[i] += (a[i][j] == 0);
		}
		r[i] = m;
	}
	long long ret = 0;
	for(int t = 0; t < k; t++) {
		vector<int> v(n);
		iota(all(v), 0);
		sort(all(v), [&](int x, int y) {
			return l[x] > l[y];
		});
		int pos = 0;
		for(int i = 0; i < n / 2; i++) {
			if(l[v[i]] > 0) pos++;
		}
		ret += min(pos, n - pos);
		for(int i = 0; i < pos; i++) {
			int id = v[i];
			answer[id][--l[id]] = t;
		}
		for(int i = pos; i < n; i++) {
			int id = v[i];
			answer[id][--r[id]] = t;
		}
	}
	allocate_tickets(answer);
	return ret;
}

• Subtask 1: 0 / 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