Submission #823073

#	Time	Username	Problem	Language	Result	Execution time	Memory
823073		fatemetmhr	Carnival Tickets (IOI20_tickets)	C++17	14 / 100	533 ms	63460 KiB

tickets

// :)^2


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

using namespace std;

#define all(x) x.begin(), x.end()
#define fi     first
#define se     second
#define mp     make_pair
#define pb     push_back

typedef long long ll;

const int maxn5 = 2e3 + 10;

pair <int, int> per[maxn5];
int cnt[maxn5];
vector <int> req[maxn5][2];

long long find_maximum(int k, std::vector<std::vector<int>> x) {
	int n = x.size();
	int m = x[0].size();
	std::vector<std::vector<int>> ret;
	for (int i = 0; i < n; i++) {
		for(int j = 0; j < m; j++)
			cnt[i] += x[i][j];
		vector <int> row(m);
		fill(all(row), -1);
		ret.push_back(row);
	}
	ll ans = 0;
	int rem = m, num = 0;
	while(k--){
		ans += n / 2;
		for(int i = 0; i < n; i++)
			per[i] = {cnt[i], i};
		sort(per, per + n);
		for(int i = 0; i < n / 2; i++){
			if(rem - per[i].fi > 0)
				req[per[i].se][0].pb(num);
			else{
				ans--;
				cnt[per[i].se]--;
				req[per[i].se][1].pb(num);
			}
		}
		for(int i = n / 2; i < n; i++){
			if(per[i].fi > 0){
				req[per[i].se][1].pb(num);
				cnt[per[i].se]--;
			}
			else{
				ans--;
				req[per[i].se][0].pb(num);
			}
		}
		rem--;
		num++;
	}
	for(int i = 0; i < n; i++){
		int pt = 0;
		for(auto id : req[i][0])
			ret[i][pt++] = id;
		pt = m - 1;
		for(auto id : req[i][1])
			ret[i][pt--] = id;
	}
	allocate_tickets(ret);
	return ans;
}

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