Submission #1305351

#	Time	Username	Problem	Language	Result	Execution time	Memory
1305351		neonglitch	Carnival Tickets (IOI20_tickets)	C++20	Compilation error	0 ms	0 KiB

tickets

#include "tickets.h"
#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;
typedef long long ll;
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>> answer(n,vector<int>(m,-1));
	ll ans=0;
	vector<pair<ll,int>> pos;

	for(int i=0;i<n;i++)
	{
		for(int j=0;j<k;j++)
		{
			ans-=x[i][j];
			pos.push_back({x[i][j]+x[i][m-k+j],i});
		}
	}
	sort(rbegin(pos),rend(pos));
	for(int i=0;i<(n*k)/2;i++)
	{
		ans+=pos[i][0];
	}
	allocate_tickets(answer);
	return ans;
}

// int main()
// {
	// int n,m,k;
	// cin>>n>>m>>k;
	// vector<vector<int>> x(n,vector<int>(m));
	// for(int i=0;i<n;i++)
	// {
		// for(int j=0;j<m;j++)
		// {
			// cin>>x[i][j];
		// }
	// }
	// cout<<find_maximum(k,x)<<endl;
// }

Compilation message (stderr)

tickets.cpp: In function 'long long int find_maximum(int, std::vector<std::vector<int> >)':
tickets.cpp:27:28: error: no match for 'operator[]' (operand types are '__gnu_cxx::__alloc_traits<std::allocator<std::pair<long long int, int> >, std::pair<long long int, int> >::value_type' {aka 'std::pair<long long int, int>'} and 'int')
   27 |                 ans+=pos[i][0];
      |                            ^