Submission #580476

#	Time	Username	Problem	Language	Result	Execution time	Memory
580476		joelau	Carnival Tickets (IOI20_tickets)	C++14	0 / 100	1 ms	212 KiB

tickets

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

long long A[1005], B[1005];
vector<long long> tmp;
vector< pair<long long,long long> > lst;

long long find_maximum(int k, vector<vector<int>> x) {
	long long N = x.size(), M = x[0].size();
	for (long long i = 0; i < N; ++i) {
		long long sum = 0;
		for (long long j = 0; j < M; ++j) sum += x[i][j], tmp.push_back(x[i][j]);
		lst.emplace_back(sum,i);
	}
	sort(lst.begin(),lst.end());
	sort(tmp.begin(),tmp.end());
	long long zero = 0, one = 0, val = 0;
	for (long long i = 0; i < N*k/2; ++i) {
		if (tmp[i] == 0) zero++;
		else one++, val--;
		if (tmp[N*M-i-1] == 0) zero++;
		else one++, val++;
	}
	memset(A,0,sizeof(A)); memset(B,0,sizeof(B));
	for (long long i = 0; i < N; ++i)
		while (B[i] < M && x[i][B[i]] == 0)
			B[i]++;
	vector< vector<int> > ans (N, vector<int>(M,-1));
	for (long long i = 0; i < N; ++i) {
		long long n = lst[i].second;
		for (long long j = 0; j < k; ++j) {
			if (zero != 0 && A[n] < M && x[n][A[n]] == 0) zero--, ans[n][A[n]] = j, A[n]++;
			else one--, ans[n][B[n]] = j, B[n]++;
		}
	}
	allocate_tickets(ans);
	return val;
}

• 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