Submission #302261

#	Time	Username	Problem	Language	Result	Execution time	Memory
302261		arnold518	Carnival Tickets (IOI20_tickets)	C++14	11 / 100	7 ms	12800 KiB

tickets

#include "tickets.h"
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

const int MAXN = 1500;

int N, M, K;
int A[MAXN+10][MAXN+10];
int P[MAXN+10];
int ans2[MAXN+10][MAXN+10];
ll ans;

int l[MAXN+10], r[MAXN+10], chk[MAXN+10];

ll find_maximum(int _K, vector<vector<int>> _X)
{
	N=_X.size(); M=_X[0].size(); K=_K;
	for(int i=1; i<=N; i++) for(int j=1; j<=M; j++) A[i][j]=_X[i-1][j-1];

	for(int i=1; i<=N; i++) for(int j=1; j<=M; j++) if(A[i][j]==1) P[i]++;

	for(int i=1; i<=N; i++) r[i]=M, l[i]=1;

	for(int i=1; i<=K; i++)
	{
		vector<pii> V;
		for(int j=1; j<=N; j++) V.push_back({A[j][r[j]], j});
		sort(V.begin(), V.end(), greater<pii>());
		for(int j=1; j<=N; j++) chk[j]=0;
		for(int j=0; j<N/2; j++) chk[V[j].second]=1;

		for(int j=1; j<=N; j++)
		{
			if(chk[j])
			{
				ans+=A[j][r[j]];
				ans2[j][r[j]]=i;
				r[j]--;
			}
			else
			{
				ans-=A[j][l[j]];
				ans2[j][l[j]]=i;
				l[j]++;
			}
		}
	}

	vector<vector<int>> answer;
	answer=vector<vector<int>>(N, vector<int>(M));
	for(int i=1; i<=N; i++) for(int j=1; j<=M; j++) answer[i-1][j-1]=ans2[i][j]-1;
	allocate_tickets(answer);
	return ans;
}

• 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