Submission #875680

#	Time	Username	Problem	Language	Result	Execution time	Memory
875680		abczz	Carnival Tickets (IOI20_tickets)	C++14	0 / 100	1 ms	504 KiB

tickets

#include "tickets.h"
#include <iostream>
#include <vector>
#include <array>
#include <queue>
#include <algorithm>
#define ll long long

using namespace std;

long long find_maximum(int k, std::vector<std::vector<int>> x) {
	priority_queue<array<ll, 3>> pq;
	ll n = x.size(), m = x[0].size(), f = 0, s = 0, id[1500];
	for (int i=0; i<n; ++i) {
		for (int j=0; j<k; ++j) {
			f -= x[i][j];
		}
		pq.push({x[i][k-1]+x[i][m-1], i, k-1});
	}
	for (int t=0; t<n*k/2; ++t) {
		auto [w, u, v] = pq.top();
		pq.pop();
		f += w;
		if (v) {
			--v;
			pq.push({x[u][v]+x[u][m-1-(k-1-v)], u, v-1});
		}
	}
	return f;
}

Compilation message (stderr)

tickets.cpp: In function 'long long int find_maximum(int, std::vector<std::vector<int> >)':
tickets.cpp:21:8: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   21 |   auto [w, u, v] = pq.top();
      |        ^
tickets.cpp:13:43: warning: unused variable 's' [-Wunused-variable]
   13 |  ll n = x.size(), m = x[0].size(), f = 0, s = 0, id[1500];
      |                                           ^
tickets.cpp:13:50: warning: unused variable 'id' [-Wunused-variable]
   13 |  ll n = x.size(), m = x[0].size(), f = 0, s = 0, id[1500];
      |                                                  ^~

• 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