Submission #771727

#	Time	Username	Problem	Language	Result	Execution time	Memory
771727		khshg	Carnival Tickets (IOI20_tickets)	C++14	11 / 100	1 ms	724 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));
	vector<long long> sum(N);
	for(int i = 0; i < N; ++i) {
		for(auto& u : x[i]) {
			sum[i] += u;
		}
	}
	vector<int> ind(N); iota(begin(ind), end(ind), 0);
	vector<vector<int>> qs(k);
	vector<int> L(N, 0), R(N, M - 1);
	for(int i = 0; i < k; ++i) {
		vector<bool> is(N);
		int sum = 0;
		for(int j = 0; j < N && sum < N / 2; ++j) {
			if(x[j][L[j]] == 0) {
				is[j] = 1;
				++sum;
			}
		}
		for(int j = 0; j < N; ++j) {
			if(is[j]) {
				ans[j][L[j]] = i;
				qs[i].push_back(x[j][L[j]]);
				++L[j];
			} else {
				ans[j][R[j]] = i;
				qs[i].push_back(x[j][R[j]]);
				--R[j];
			}
		}
	}
	allocate_tickets(ans);
	long long D = 0;
	for(auto& u : qs) {
		sort(begin(u), end(u));
		for(auto& v : u) {
			D += abs(v - u[N / 2]);
		}
	}
	return D;
}

• 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